How Does A Gas Nozzle Know When To Shut Off?

[@QuaabQueb]

If this guy was anymore laid back he'd fall over

[@mayankrocks89]

Videos from Québec Lmao

[@Manayz]

this shit actually made me laugh out loud 😂😂😂

[@Mostviralvidoes]

Made me tickle this comment.

[@iv3010]

So laid back he's horizontal

[@martinc.720]

TNTejas how is it funny??

[@EqualsThreeable]

As a Gas Station owner I already knew this, but not in this much detail or a diagram, I didn't know what the effect was called but I certainly knew it was mechanical. Here's something you may not know, the pump nozzle( the handle and everything besides the hose) is surprisingly cheap, while some models may run a little better or be built better they can be purchased for under $14. The safety mechanism does fail, but there aren't many ways to test pumps to see when they are going to fail, some may work for years or fail a week out of the box. This is why it is still a law for you to be attending the pump so it is not to overfill and not the owners fault that you were irresponsible. Here's a tip if you ever notice this mechanism going off when you know your tank is not full this is because the pump isn't all the way in your tank or something is blocking it causing gas to flow up the tube, you see their is often a metal flap in your newer cars between the outside air and the tank, so if this happens just take the pump out and reinsert it into the tank. Finally a safety tip, if under any circumstance a fire occurs at the pump don't remove the nozzle from your cars tank, your car will not explode, there isn't enough oxygen in the tank for the fuel to burn so just the fuel and gas on the outside catch fire leading you to believe the flame will reach the tank and blow up. It would eventually happen but not if you rush to the attendant and have them press the emergency stop button to prevent anymore gas from flowing and to activate the on site fire suppression system or any near by fire extinguisher.

[@DCMAKER133]

it also is stupid that most don't have a manual by hand shutoff like they used to. if what you said above were to happen in the past you could flip a lever were you store the nozzle to stop the flow.

[@EqualsThreeable]

​@@DCMAKER133 Actually the lever is still there on most dispensers. Its usually plastic, it detects when the nozzle is hung up. If you were to press it up for 2-3 seconds the flow would stop in all actualities. However, that is my experience with most dispensers I have come across.

[@DCMAKER133]

@@EqualsThreeable the lever has been moved to inside the top hole where you push the nozzle into. That's not something you can easily push up with your hand compared to the old ones where you have to flip the base of the nozzle stand up and down. (At least from what I have seen and understand. I could be mistaken)

[@johannebasa]

it's basic if it's taught or read, but coming up with an idea like this needs a man with imaginatoin

[@pokealong]

Johanne Basa Same goes for many great inventions. I often find myself thinking "well anyone couldve thought of that"... But it's always the ones with the most creative minds.

[@danmcclaren5436]

If you learn and practice basic engineering fundamentals such as fluid mechanics and you need to come up with a solution to a problem, it's just a matter of time before you figure it out.

[@jlassy07]

Sure does, patents.google.com/patent/US4199012

[@CoolGuy-dg9nf]

I guess everything we have had to be imagined... Lol

[@mikef.9494]

“…man”…OR A WOMAN…”with imagination.” As a retired registered professional engineer with 38 years in aerospace I’ve worked with plenty of women engineers and every one was as good as the men.

[@Jack-rg1ys]

Good to finally hear someone in an educational video of this style outright say that something is complicated! Usually it's "well it's not as complex as you might think" but, I don't know, maybe it's just good to know that not everything has to make perfect sense in three minutes.

[@megalomaniac7972]

I thought that was sarcasm

[@adriankruger6004]

"Remember fluid can be gas..." I had to think twice about this.

[@revimfadli4666]

Adrian Kruger but can gas be a gas?

[@Shrirajtyke]

Basically anything that flows is a fluid

[@WirageVoyage]

@@Shrirajtyke The guy had a pretty good flow during his video

[@ochaarul786]

Fluid not Liquid, and it can be gas.

[@Tensho_C]

@@WirageVoyage fluid man

[@fatheramerica]

I just had an experience at the gas station where the gas didn't shut off. It kept pouring and I didn't notice till there was already a pool of gas on the ground. My tank was full, but the nozzle didn't shut off. Prior to watching this video, I assumed there was a bad sensor, or issue, with my vehicle. After watching this video, I realized the issue was with the gas nozzle. Thank you for the knowledge.

[@Draino2110]

Did it ruin your paint or ur engine?

[@chickenmeet]

Just happened to me today . Smh

[@st.michaelthearchangel7774]

That's rough. Don't ever put the nozzle in your tank, push the clip up to auto-fill and walk away, though.

[@boberjackie]

does that mean I'm filling up a diaphragm of extra gas everytime I fill my tank? that extra 0.0001 cent :(

[@pokealong]

Jack Johnston Bob well according to his animation, the gas goes back into the tank due to suction, which is actually what deflated the diaphragm. Not 100% sure otherwise I wouldn't be on this video. But that's what it looks like.

[@Maximate]

You are not paying extra. You can see that when gas nozzle stops gas flow, you need to hold nozzle in fuel tank couple more seconds or you splash some gas to the ground.

[@pokealong]

***** Thank you for pointing this out. I had never thought of that.

[@RandomInternetProfile]

Otto, are you russian?

[@geniuswithacapitalk]

It doesn't drain automatically because the valve shuts off, to drain it you have to pull back the nozzle just enough to release the pressure and left over gas. Gas stations tell you not to pump if the nozzle isn't all the way inside but that's bullshit. If you keep leaving that small amount of gas you're literally giving your money away to the gas stations. You may think it's only a little squirt but with thousands of squirts left behind everyday that adds up over time.

[@markchavez738]

I didn’t ’t even know it would shut off. I never have enough money to fill it up all the way. 🤦🏽‍♂️

[@timothylarkin4916]

Get a job

[@Steve-st4zc]

Bert Beetleboots there’s something called responsibilities

[@timothylarkin4916]

BIN AP so putting gas in your car and getting a job isn’t a responsibility😂sounds like you have your priorities in order bud

[@Steve-st4zc]

Bert Beetleboots you puttin words in my mouth . this kid probably had to pay bills before he put gas in his tank.

[@Daphneamy360]

@@timothylarkin4916 be nice

[@JonahBaker]

I could watch this video on repeat for my entire life, and never understand it.

[@janegoodall1837]

He doesn't explain it very well. Seems like he only has a surface level understanding itself. "Fluid can be gas", I mean C'mon. I know he's talking about gasoline specifically. And not gas, as in the elemental state. But he should specify. It's little things like that which ad to confusion.

[@iCommentify1]

@@janegoodall1837 Since gas (the elemental state) is considered a fluid in the context of physics/fluid mechanics, and "fluid" can mean liquids, gases, and plasmas, that is actually what I thought he meant when he said "And remember fluid can be gas, it can be liquid", not gas(oline). But... then he says "it doesn't have to be water or something", which seemed pointless. Now I saw your comment and I don't know what he meant anymore LOL

[@mrjimi1]

@@janegoodall1837 No, what he is saying is that fluid dynamics works with gases, liquids and even solids, more specifically, that fluid does not mean liquid, we only associate it that way because liquids are more obviously fluids in our everyday lives. Though I'll grant you , he doesn't explain it very well. Honestly, this seems a fairly simple solution, not complex. As you fill the tank, the air in the tank has to go somewhere. The nozzle takes some of it and as there is less air in the tank the pressure coming up that tube lessens past some balance point and the trigger releases. It's ingenious in its simplicity. Like a thermostat. It takes a fairly simple concept and applies it it a useful way.

[@arjunpatilyouthcricketer5864]

I am a kid but after watching this for the first time I understood what he was saying

[@robira1313]

@@arjunpatilyouthcricketer5864 - You will come to find out that a lot of grown-ups are not as smart as kids.

[@chrisnotap]

Great explanation. Good video. Kudos

[@lignxc4442]

Wow your 3 years older

[@ahsasgamer8334]

ثتبةمف نقى نبى

[@مسعودجزير]

@@lignxc4442 ⛽⛽

[@kingkevin267]

That was a very confusing way to explain it, it is a lot simpler than you make it sound. Basically as you pump gas into your tank the air that is in the tank is displace and pushed up through a small hole in the nozzle, and into Basically a rubber boot. This diaphragm or rubber boot, while inflated, holds the shut off valve open. as the tank fills up, the amount of air being displaced decreases. At some point the amount of air being displaced is to low to hold the diaphragm, and the diaphragm collapses. Once it collapses the shut off plate falls down cutting off fuel.

[@PrivateAccountXSG]

thank you, sir. fuck this guy, they need to hire you!

[@vlatkomafija]

but i often when hear the first shut off, i continue by slowly pumping gas for some additional 1-2 liters until i hear a second or sometimes third click. is that fuel actually going in the tank or is actually sent back?

[@kingkevin267]

Vlatko.R don't do that it is a waste of money and harmful to your car. When the pump first shuts off, there is still a small amount of space at the top. When you keep pumping you over flow the tank. That over flowed fuel is caught is what is the evaporative emissions system. As you pump fuel a small amount of fuel evaporates, and is released into the air. This fuel is harmful to the environment, and if built up enough could cause a explosion. To prevent that, they a charcoal canister by the tank. These vapors are caught by the charcoal inside the canister, and clean air is what is sent back into the pump, for the shut off. When you keep pumping you are no longer sending vapors into there, your sending straight liquid fuel. That fuel saturates the charcoal. The charcoal gets to saturated and no longer works. Then your check engine light comes on, and you need a new one. So not only you wasting money for fuel that isn't going into your tank, but your also possible damaging your car, the environment, and risking causing a explosion.

[@sambyrne7542]

I dont understand

[@jordy5745]

Just say: AIR

[@Draino2110]

Bro I’m so glad I decided to click this video, just got a car and my tank is 23 gallons, I wanted to get to 20 but the nozzle shut off at 19.5 and I was confused because I thought it was broken so I kept squeezing it over and over till the display said 20💀💀 nothing happened luckily but glad I know this for the future

[@erinmurphy6993]

He forgot to mention how the increase in air density or the movement of air in the pipe creates the vacuum that releases air from the diaphragm. Its more complex than that. You either have an electro mechanical valve that opens when the sensor senses increase pressure or a mechanical release valve that opens when a certain amount of pressure is put on it by the increased air pressure in the diaphragm. These mechanical valves are similar in design to the emergency valves on propane tanks or the air feed valves you use to put air in a tire.

[@GlzMo1234]

Good video topic, but very poor explanation.

[@kdu8004]

GlzMo1234 for 2:43 seconds, that was about as good as it will get.

[@TheUnPlayable]

GlzMo1234 Well I fully understood the solution the first time so I guess it was explained pretty well.

[@MKNinja]

GlzMo1234 There was a video showing how it works... Air pressure.

[@idontgivead4mn]

GlzMo1234 Thought the same thing. - The explanation of the Venturi effect is wrong (The pressure before and after the "pinch" is equal. It drops IN the bottleneck not after) - Also density is not "heavy". Its either low or high. Not mentioning the akward "gags" at the beginning of the Video. When you want to do an explanatory Video please check your facts. Did i mention mention youre not funny? Just my 2 cents.

[@GlzMo1234]

+GlzMo1234 I shut it off after about 45 seconds. After he said (0:39) "after the pinch.. after it goes through the pinch it becomes compressed, and as its velocity speeds up, the pressure on the other side of the tube actually decreases"..... After that mess of a sentence I couldn't bare to watch anymore. Let me explain why that sentence is so confusing (and just terrible) so you don't think I'm just randomly bashing the video. 1. "and as it's velocity speeds up" -- Velocity doesn't speed up, the gas does. 2. "and as it's velocity speeds up" -- The fact that this causes the velocity to increase requires explanation, or at least some form of acknowledgement. 3. "the pressure on the other side of the tube" -- Where is the other side of the tube? Do you mean other side of the pinch? If so, which side is the 'other side'.

[@sciencemanguy]

How do you convert mechanical energy into electricity

[@tomalstar]

motors

[@thierryspooner5817]

motors convert electrical energy into mechanical energy... a turbine converts mechanical energy to electical energy.

[@tomalstar]

They are the same thing. They both work both ways.

[@justmechanicthings]

Thierry Spoon well all you have to do to create a turbine effect is spin the motor manually

[@rxin262]

sciencemanguy ,the easiest way is an alternator...spin it manually or set up a contraption to where a bike is spinning it.

[@weaponofmassconstruction1940]

0:52 That gas nozzle appearing almost gave me a heart attack.

[@whopperlover1772]

Bro XD

[@frostbite585]

Lmfao

[@Gr8Layks]

🤣🤣🤣

[@doctorc8852]

How did someone invent the engine.

[@jefferyjin5551]

how did someone invent the engines that need fuel?

[@marciocorreafilho8293]

Short Answer... People start to see alcohol or oil burning. Then they put some in a bottle and it just explode when fire comes close... Then Someone start to think: If i put this a container and keep supplying fire and fuel constantly, I can move things! Then people start to make better...and better engines... Lot´s of people loose heads, hands and fingers during the process... But essentially it was done this way...

[@geethsan1567]

Superb answer.

[@wrightway65]

Please explain the losing hands bit..

[@joyrider6456]

+Ricky Wright OMG.....u serious -.- '

[@Kimmons2]

This was the simplest explanation I could find for a very complicated answer. My daughter asked this question & we both can't believe how involved there answer is. Venturi effect - thank God & smart people for it!!

[@ReevansElectro]

This presenter would make a great accountant or mortician. Many of us had teachers in school that were equally as enthusiastic and put us to sleep.

[@MadSparks164]

Nice explanation, but for the love of god, don't refer to fuel as 'gas' when you're explaining gasses and liquids -.-

[@StreetPeter]

Gas is short for gasoline.

[@StreetPeter]

What's a tmz?

[@HelloKittyFanMan.]

Or gases and liquids (whatever "gasses" was supposed to mean).

[@HelloKittyFanMan.]

(Non)"Tough Guy," I think he knows that. That was his point, that it's confusing when they're put together like that. But it's not really officially short for that.

[@6subswith0vids80]

2refloG i wanna know what TMZ is too

[@davidstafford4873]

I love the simplicity of your explanation and graphics. It's good enough for the non engineers.

[@22lrjayden81]

I always wondered how these worked. Great to know

[@Hadgerz]

having to listen to this guy call fuel 'gas' while he in the same sentence talks about gas being sucked up the tube that is supposed to be sucking up air (clearly an ACTUAL gas) pretty much makes this the most confusing explanation possible. Can't you call the 'gas' _fuel_ at least?

[@Mommyofmeats]

I'm pretty sure he uses the term 'gas' as an abreviation for 'gasoline.'

[@Hadgerz]

iamjesica 'gas' is what you call something that isn't a solid or a liquid. Using the word for anything else when talking science is BS.

[@Mommyofmeats]

Yea I understand that, but he's American. We don't really say "gasoline" or "fuel." "I'm gonna go get gas," is used more than "I'm gonna get gasoline."

[@petergao6998]

+Hagz you missed plasma, which is not gas, not solid not liquid.

[@Hadgerz]

Xiang Gao I thought about it when writing the comment, but decided to leave it out anyway because I knew someone would add it. Thanks for fighting the good fight ;)

[@dsbennett]

I watched two other videos about this. The first one went on for 15 minutes just explaining the venturi effect. I gave up and clicked on the next one. Sounded like the dude had his hand over the microphone. Third try was the winner - Along comes Josh Clark and tells it like a pro. I love him and Chuck on "Stuff You Should Know" podcasts.

[@Lerkero]

Its not really complicated. This is basic physics. The complicated stuff is way beyond this.

[@Willy-nu3oc]

talk about "generally speaking"

[@Willy-nu3oc]

Carlton Banks was that you?

[@brockm4047]

Always wanted to know how that worked but I was never interested enough to look it up. This video popped up and it was a good 2:43 spent. Thanks!

[@chan4est]

Speed up this video by 1.25 and maybe he won't sound like a mopey middle aged map

[@alejandrorubio118]

Figler thank you.... I was contemplating deleting my KZbin app but you helped me stop KZbin app suicide

[@Shedding]

Filter, I can't wait for you to get to middle age bud.

[@universalpedagogue]

Now he sounds like he has ADHD. 😂

[@DrunkMouse2030]

True

[@TLCHobbies]

It's funnier at .5 speed. He sounds drunk.

[@lilnightsand7079]

Very great video. Great explanation. This man has a talent for teaching hard concepts in an easy-to-understand-way

[@poederruiker5757]

Man, I love Josh. The dry humor really fits him

[@kensendelofski3761]

I've actually wondered about that for decades. I'm serious, I've read some of the comments. I found it interesting. Thanks

[@oneaburns]

To me, it's counterintuitive that the pressure behind the narrowed tube would be lower. It seems like it should be higher. If you pinch off a hose the area behind it expands due to higher pressure.

[@luigiman403]

oneaburns It's as if each particle is a person running by a line of people giving high 5's to everyone in the line. If he is going fast, he can only barely give a (low pressure) high 5. If he is going slow, he has all the time to high 5 and push on each hand (high pressure).

[@Bob5mith]

+oneaburns The pressure after the pinch is lower; He said it wrong.

[@ThePaigeMa5ter]

I googled this months ago and didn't get a good answer from wiki or anywhere else, this is a good explanation

[@icyhail5676]

The nozzle will not turn off/lock unless you have filled your tank to full. The only way to stop the nozzle from pumping gas if you aren't filling to full is to release the pump. Hope it helps!

[@Gilbert718._]

Nope my keeps shutting off n it wasn't even on half way marker

[@EclipticFactions]

honestly I always though there was some kind of system in the gas tank that once it fills up it sends an electric shock that is then transferred to the pump it self (to make it shut off), I mostly thought this because both the gas handle and the hole are metal and when I fill up my 1 gallon gas container it never shuts off. great information thank you!

[@samaclaus21]

Nice video - just found this series and it's great stuff! Have a question proposal - I've always wondered if it's more environmentally friendly to use the hand dryer or a paper towel when you wash your hands in the restroom. Is there any way to know?

[@Apple1grApe2]

I'm overwhelmed with your enthusiasm

[@alberteinsteinthejew]

Christian Bale's lost American brother...

[@specialbeamcharlie7250]

+Michael McNamara You beat me to the punch!...by about two weeks

[@pharaohgaming3320]

Holy shit

[@Crazyness2122]

Michael McNamara This comment fulfilled me.

[@a1chemistic]

I am very impressed with the animated demonstration it helped me understand a ton.

[@alexriesenbeck]

That's about all I'm impressed with. !

[@LivingWithTheGuzmans]

Good info thanks

[@tessmacie9924]

All I want to know is why the thing shuts off, and I only put $.22 worth of gas in my car. I had to ask a kind person how or why I am holding it the thing incorrectly. No one to help in the gas station. Please show how to hold this nozzle correctly.

[@EqualsThreeable]

As a gas station attended I learned about this years ago, it still baffles my customers when some of them don't know you can do this. They are like, is it going to stop by itself? Now sometimes, rarely, but this mechanical stopping mechanism sometimes fails, if the diaphragm pocket of air is busted or the straw is busted, I've had overflow incidents. Customers always try to blame it on me, we replace them when they are expected to go, but no amount of safety guards can always prevent an incident. This is why, as a customer you are to always stand by the pump, no matter how cold it is; and I know it's cold in Michigan, you have to attend the pump. Put away your cell phone so you can be observant, turn off your engine, make sure you touch metal other than the pump if your car seat or shoes make you prone to static shocks. Finally, if it didn't need to be said before, and it shouldn't, no smoking anywhere on the premises, why would you?

[@ElectricityTaster]

***** A mechanism that closes the valve if the diaphragm is broken could prevent any spill accidents.

[@juliolp95]

agun17 fry, ur a genius!

[@ElectricityTaster]

juliolp95 I knew those online IQ tests were unreasonably low!

[@juliolp95]

agun17 thats totally ssomething youd say! Lmao

[@Carlitosway211]

***** gas station attended

[@Naked_Snake]

The pressure doesn't decrease after the pinch--it only decreases at the portion of the higher velocity around the pinch. The diameter once again increases and hence velocity decreases and pressure increases again. However, the pressure after the pinch might be slightly lower than before the pinch due to losses.

[@Poodleinacan]

*clonk* *clonk* *clonk*

[@Redparasyte4338]

Poodleinacan love that noise

[@e2m514]

who's there?

[@shinobi-no-bueno]

awesome, I work as a fuel pump attendant and was just wishing for a video like this the other day and I stumbled upon it without looking ☺

[@tylerrude4898]

Awesome video! I love this channel. Although, it would be nice if it was a little more in depth. For example how the diaphragm triggers the auto shutoff.

[@adrianmuhammad4887]

I was pumping gas the other day and had this exact question! Came on KZbin to find music and I come across this video. Thank you for this video..

[@DarkElfDiva]

Having trouble with the nozzle shutting off too soon? Turn the nozzle upside down.

[@mavesteam8341]

It's amazing how this guy is able to work in this channel.

[@bobsacamano6874]

Next video: How does a shirt know when it needs to be ironed?

[@torpa15]

wow, i've been listening to Stuff You Should Know podcast for years, and i've never seen this guys face. My ears and eyes are freaking out because i've had this imaginary image of this guy in my head for so long that i can't comprehend seeing someone different

[@juliusdaviesd]

I always wondered this! But then sometimes I like to round off my gas bill, so I keep pumping the gas nozzle even after its full so it pours a little extra and hits like say a round number like 52. But how does that happen, when it is already full?

[@cobiegaming]

Old king cole was a merry old soul and a merry old soul was he it's a long tube so it takes a while to reach

[@midtennturney]

is that a combat arms profile picture?

[@BenJaminLongTime]

"its complicated"

[@greenthizzle4]

Old king cole was a merry old soul and a merry old soul was he you realize that your car has a vapor release mechanism that will get plugged if you do that, it's called vapor lock and when you go to fill up the handle will click off even when its empty and it will take 20+minutes to fill your car when it normally would have been 2 minutes.. don't do that it's gonna break it and cost money

[@greenthizzle4]

Old king cole was a merry old soul and a merry old soul was he that also could be the kind of stuff that causes the handle stop systems to fail, I'm a gas station worker and had one fail yesterday while someone was not watching it inside the store.. btw it's illegal to leave your car unattended while it's filling

[@RykGood]

So I was just perusing KZbin when to my surprise I stumble across this video. While prepping myself for an educational dose of information I think to myself, "Hey! I know this voice! It's Josh from SYSK!" And I got that weird feeling when meeting someone, like a pen pal, for the first time. That's my story, anyways thanks again for yet another informative and educational lesson about stuff.😁

[@vvvortic]

can you le teach me how to get outta bronze, im tired of teammates holding me back in the friendzone per say, also tfw no gf ;[

[@6subswith0vids80]

vvvortic what

[@marcellb579]

Are you talking about league?🤔😂

[@ΒασίληςΒλάχος-υ5χ]

vvvortic lol vvvortic the legend

[@connerlacefield8575]

marcellb579 fuck league he's talking about rainbow

[@YouTubebingewatcher]

mind blown, I will look at that nozzle and say " HA! venturi tube you are a trip"😁

[@roy44743]

how do you iron a pink shirt?

[@myytchannel6632]

You put iron on it! Duh!

[@vibhvesh]

I’m a an engineer and I used to work for the company that originally created that design. I can confirm that you are correct in your assessment of how it works. Also, most gas nozzles have a second diaphragm or plunger (not membrane) that deflects when there is pressure in the fuel line. It is used for prepay fill up. When you hit the prepay amount the dispenser shuts off, the pressure in the nozzle drops and that second diaphragm which is spring biased up will move and shut the nozzle off. There is a third shutoff in some nozzles that is called an attitude device. When a … moron… pulls a flowing nozzle out of a car’s fill pipe, a ball bearing blocks the pickup tube and shuts the nozzle off

[@Boryspitzanzx]

If you play the videos at 1.25 it actually makes up for his lack of well i would say enthusiasm but mostly any part of GIVING A SHIT about the topic.

[@calicodeath]

+Boris aey they do a very nice and popular audio podcast and this is how he usually talks and makes it easy to understand when listening but it comes across as a lack of enthusiasm in the video because many common you tubers videos act with the enthusiasm of a cocaine addict.

[@mr.e8226]

that's his Shtick. he's a slow deliberate talker. And I kind of hate it when youtubers fake enthusiasm about topics that don't need passion. he's talking about a shutoff mechanism not selling you BMW :) haha. I thought the pace was good to explain it in less than 3min

[@KingstonFortune]

LoL for some reason I just love this guy and how he explained the whole thing, keep it up 😅

[@WillShackAttack]

Good, I don't have to pay for overflowing gas!

[@michaelbutler881]

They're surprisingly complex, and no wonder they're expensive. I work in the fuels industry servicing all these parts and a standard nozzle costs around $650-$700 each.

[@jonmeans8807]

Is there a way to defeat the shut off, like using the nozzle upside-down.

[@michaelbutler881]

@@jonmeans8807 no. Also they have a one-way pressure activated valve inside which is only open when the pump is running. So when you preset fuel to pour into your car and it reaches your preset value the valve will shut. Sometimes you see people lifting the hose up to try and empty as much of it into their vehicle but the one-way valve has shut.

[@ESPPsycho]

I'm sorry, but this was not explained well.

[@snakewhisperer2010]

really?

[@myytchannel6632]

People like you knkw how to say it was not explained well but you have no written explanation or a video of ypur own. Some people, I swear. If I find you, I will enroll you back in school.

[@damiensadventure]

The fact that we don't die daily with that much complexity in a safety device is astounding lol

[@SanderWolbers]

I get it, this ain't complicated at all

[@colinmacvicar2507]

As I was filling up earlier today I was wondering how this was done and thought I should look it up on KZbin but then completely forgot about it. Now I’m browsing recommendations and see this. I knew my phone was always listening but didn’t know it could read my mind as well.

[@kajikasarvis6669]

Colin MacVicar nothing but God showin ya homie

[@colinmacvicar2507]

Kajika Sarvis yeah that must be it

[@acabxiii]

Inarticulate and complicated ass explanation.

[@dieselmiro7241]

I've held this question in my mind since I was 4 yrs old .. no body answered ! thanks a lot!

[@CalebNestor]

Please explain the gas pumps that click off for no reason and you have to find the sweat spot for it to pump.

[@josmith4531]

Caleb Nestor The valve is out of adjustment,

[@DIZAZZO]

The answer to something that I never asked, or thought about... But I'm glad to know now. Cheers.

[@Groaznic]

Next, please explain the same thing on Don't Be Dumb! :)

[@patrickcharles7190]

I figured it would be some clever little trick but, no, they scienced tf out of it. Thanks

[@Poodleinacan]

Electronics?

[@Lengone1]

I thought that at first glance as well. Then I remembered what happens when a spark of static electricity occurs in a fuel/air mixture. I was confused until this guy explained it.

[@collinvance2331]

Lengin

[@Goldfish_Vender]

Electricity can fail.

[@e2m514]

selling or buying?

[@Nyck461]

The reason why I watched this video is because I was wanting to know what causes the pump to shut off. I liked the explanation.

[@Camps2630]

I did not know this. I just assumed it would overflow or something...

[@jgueroz71]

I've always wondered this

[@tokekkk]

How does a Gas is liquid, but liquid is not gas? Who invented English language?

[@jacobmarciniec4143]

I think you have mixed up the words "fluid" and "liquid", my friend. No worries, it's an easy mistake to make! But to clear things up: a "fluid" can be a liquid or a gas, but a gas is not a liquid and a liquid is not a gas.

[@greenthizzle4]

gasoline is a fluid man, gas for short

[@revimfadli4666]

Jacob Marciniec how is gas not a liquid? You saying cars don't use liquid fuel?

[@jacobmarciniec4143]

Revi M Fadli The mix up is that "gas" has two definitions. "Gas" is a state of matter, just like "liquid" is a state of matter. But "gas" is also commonly used to refer to "gasoline", a (usually) liquid fuel. What confuses people even more is "fluid". People often use "fluid" and "liquid" as synonyms, but technically they are not. A fluid is anything that is in the gasious or liquid (or plasma, if you like) state of matter.

[@greenthizzle4]

Jacob Marciniec I see what you mean, that's really nit picking

[@Agaptos]

I just love the way Josh does this videos...its hilarious for me. hahaha keep it up!

[@cametochangemyusername-can1295]

In Australia we don't use the term "gas" when referring to "fuel" or "petrol". So I'm confused when he says gas is heavier than air?? lol 🙃😖 Is it?

[@Jorvas25]

Very laidback guy. Thanks for the knowledge imparted.

[@BerndtTost]

Gas, liquid, solid - the three normal phases of matter. Yeah, I know Americans use 'gas' as a shortening of gasoline but it sounds incongruous when used in the context of this video.

[@greatvedas]

Just watched your video for the 1st time... and now immediately I subscribed ! good stuff mate.

[@AntonioAugusto1010]

Shirt + Iron

[@whyshouldwecare3267]

0:14 I genuinely thought he said "huffing gas" lol

[@burnzy3210]

0:32 "fluid can be gas" american logic

[@kirbykarter]

burnzy3210 as in american logic, you mean the definition of a fluid... "fluid (n.) a substance that has no fixed shape and yields easily to external pressure; a gas or (especially) a liquid."

[@SurvivorAndBatman]

burnzy3210 think about clouds buddy

[@oneaburns]

Gas is short for gasoline, dipshit.

[@Imnotsorich]

Aluminum is pronounced as aluminium. British logic. At least gas is a shortened version of gasoline. There's no extra fucking i in aluminum to be pronounced that way.

[@rogeranashantz7074]

Richard Potts snowmobile trail riding

[@eblamo]

Can "topping off" damage your vehicle or the pulp? Why is it discouraged?

[@Thitavares]

182 People don't have money to fill their cars...

[@musaal-sulaimani4727]

explain the science behind the different settings on the blender. does the blade spin differently for each setting?

[@geetarwanabe]

In the UK you simply let go of the handle and it turns off...

[@BrainStuffShow]

+geetarwanabe You can do that in the US, too. But many pumps here also have notches that hook the trigger into place, allowing the gasoline to keep flowing without you needing to keep holding it.

[@alantonix213]

+BrainStuff - HowStuffWorks ah...America :D

[@jerryblue017]

+geetarwanabe All gas pumps auto closes.

[@IonoTheFanatics]

+alantonix213 and also pretty much any country that uses pump machine built in the last few decades at least if not longer.... i mean i visited Singapore and Malaysia of all places a while back and even their pumps have automatic shut off when ur tank is full as well...

[@phoenix1925]

+geetarwanabe what a stupid comment...

[@DoomFinger511]

You explained a very simple concept in an extremely complicated and boring way. Thanks for that.

[@methamphetamemes4206]

It's not called gas. it's petrol or fuel.

[@BrainStuffShow]

+MethamphetaMEMES In the U.S., the common word is "gas," short for "gasoline."

[@strikedown321]

if you think about it, British people shouldn't even call it petrol. petroleum is the stuff that comes straight out the ground, which isn't close to gasoline at all. that would be like calling steel products iron.

[@Raprada]

+MethamphetaMEMES of course you'll expect the only country that use the word "gas" for a liquid matter is the same country that called a sport "football" where they barely uses their foot to kick the ball :P

[@Stormprobe]

+Riswan Ahmad P Or soccer.

[@garysmart1]

+MethamphetaMEMES my grandma gas smell bad

[@The_Unknown_Wanderer]

I've always wondered, but I never bothered to look it up because I didn't have the time. Now I see it in my recommendations and think, "What better time than now?"

[@Tato0Tato]

why is this guy so....slow

[@samhanmma]

I was asking my self how it work . Thanks I am subscribing

[@MrGodmilan]

Found this on CarThrottle and now i'm subscribed :)

[@hattrickster33]

If I wanted someone to tell me that the plane I'm on is going to crash, or that the world is going to end, it would be this guy. Calmest dude ever

[@vaibhavravichandran]

Hey! Thanks for the video :) I never knew how this worked until now. Also, just a quick aside, in countries outside US "gas" typically doesn't mean gasoline or fuel. And since this explanation relies on the difference between air (which is a gas) and fuel (which is a liquid) I think it might be a little confusing for some folks watching who don't know that when you say "gas" it's the liquid fuel. Thanks!

[@ItsonlyaJimmy]

I will think about this my whole life. Thanks man it did actually help me out. My only words of advise. A couple of more takes and this video would have been perfect. Thanks for posting it also.

[@danankive]

What font do they use for the text on screen? and why is it wobbly? Is it something to do with the font or they just make it wobbly?

[@BrainStuffShow]

Hey, Paul here. I do the editing and animation for BrainStuff. We actually use a bunch of fonts on the show (the question, for example, uses a different font for every word). The wobblyness of the text is just an animation effect that we thought looked cool. Hopefully you agree? Maybe?

[@danankive]

BrainStuff Ofcourse i agree. Its great. Is there anyway you can tell me how you do that? But before that, you deserve a lot of credit for the popularity of the channel. Your animations make things lively and lovely. So, keep doing that

[@yoeieyang]

Interesting. Both simple and complicated at the same time. This tech has been around with us since ages ago. I just found out how it works today LOL

[@kapilbusawah7169]

This is something to actually educate conspiriors

[@quatermass8]

Confusing using the term 'gas' when air is a gas. Petrol is not a gas. Though I understand in other parts of the world liquid fuel is often termed 'gas'. Tricky to follow when not used to this.