#409

[@Observ45er]

A little correction. The low pressure starts as the water begins to enter the narrowing section; where your arrows are *beginning* to converge. Where the arrows diverge (at the exit of the narrot section) the pressure is indeed increasing. However, with a rapid expansion in diameter of the pipe, a secondary low pressure area is formed where your "vacuum tube" is located. This is because the water cannot make a rapid turn around the angle of the expanding tupe and is trying to continue straight. In effect,the water "pulls away from the curved side forming a lower pressure area.

[@rachelg6350]

So helpful. Thank you

[@LonghornInOmaha]

Venturis are heavily used in koi pond builds, too. Great explanation.

[@Shivamtraders92]

No it is not a knowledge bomb ,it just your lack of attention towards your study

[@iva4856]

Any developments or thoughts to turn this into a nanobubbler for watering your plants? SOOO hard to find on the Net a product or simply laid-out DIY design without being an engineer or paying BIG bucks. Incredible.

[@jlathem56]

Another common place you see this happening is in power heads. Great explanation Greg.

[@martintopp7253]

Really Great Video. You explained it so simply and so well. I once heard this statement: "When you fully understand something you are able to explain what you are talking about simply." This statement is proven true in this video. Thanks So Much!!

[@omaberry450]

Very well explained, excellent!!!

[@jasondarnell9488]

Very good explaining! The video I needed!

[@OldSchoolFishGuy]

Nice explanation - top notch video for sure

[@ThuyPham-gf3ez]

Can you please help with 2 questions: 1. difference between air and water as the driving media for venturi vacuum pump? I know of two systems in 2 different machines. Which one is better to use? 2. For the system that use water as driving media, we have to keep the water cool ( recommeded < 15 degree C). If water is hot, the venturi fails, but why? what is the difference in properties of hot and cool water that causes this? I've been trying to understand these points. Thank you so much in advance.

[@gelomelo3426]

Hi sir. A question pls. Bernuli equation is only for incompressible fluids, but air is compressible. So how pitot tube and bernuli principle works for airplanes to calculate the velocity ✈??? Bc air is compressible Thank you so much.

[@KevinsCaninesAndAquatics]

Can you do a video on using a matten filter overflow using a venturi system

[@guillo2245]

Hello. One question, why is it that the water flow dosent go via the venturi vacuum tube? Shouldnt it create a low pressure again there and the water flow this direction?Thanks!

[@frankvee]

The right side is low pressure, not high pressure. Low pressure is what enables you to add the tap for the vacuum tube.

[@21williampaul]

Will that work with air as well?

[@robhicksaquariums8332]

great vid fist one i have seen and so simple to understand

[@umahati9083]

thank you :) do you think we can use it to circulate the swimming pool ? please kindly let me know :) thank you :)

[@ilexwang715]

interesting how much more pressure would you be able to achieve using the venturi principle? thanks

[@johnmarkzimm]

That was great! Thanks. Does the exit side need to be bigger? Because now you have the pump water AND the vacuumed water exiting.

[@gregjonesonline]

I take that back, the pvc inlets are 3/4" and the outlet is 1"

[@abbak703]

GOOD EXPLANATION, CAN you put a video using diffrent diamter pipe and its effect for giving oxygeneted air -aeration- to fish pond

[@DocuDramatic]

Far out. Finally someone explained it well. I will use this to move plastic parts by air.

[@Observ45er]

The PVC fitting is called an ejector pump. It uses entrainment and has nothing to do with the venturi. Ejector pumps are used in ships' bilge pumps because an unlimited supply of sea water is available

[@palaash4]

BUt can you explain why the pressure reduces in the venturi when the flow is constrictred?

[@vicchavez6570]

Most Venturi injectors have the vacuum hose connected at the low pressure middle part. Is that why mine won't work?

[@FantasticCalamity]

I have a fresh water spring that keeps a 50gal drum over full 24/7 which is connected to 4000' of 1" geothermal tubing with something like 900' of head. I am trying to filter and aerate a goldfish pond that is about I want to say 500gal tops while being offgrid. 2 HUGE goldfish and 2 smaller ones. I want to use a venturi siphon pump but I am not sure how to build it. I want to move water from the fish pond into filter media bucket which will be drained with U siphons. Can you help? I work a small gold claim in the mountains every summer and I have to bring my fish babies with me and I need to keep them healthy.

[@dwainkitchel1316]

great walkthrough!!!

[@dipsydodunkeroobaby]

That was a knowledge bomb 💥💥

[@jefftyt]

Good stuff!

[@snafoo131]

using this for MCAT studying - great expl!

[@benboone007]

so could you in theory put one of these T's on the return of your canister or sump, with a valve on the vacuum side, that you could lead to say a bucket of water or something to refill your tank for a water change without using a pump?

[@gregjonesonline]

sounds highly likely, as long as the pump is strong enough to lift it

[@trevorcole460]

Thanks for the upload, Online I have seen a make of these pumps (V-Pump) and they claim that it can push water 💦 40ft up! Is this possible as the device looks so small, and secondly they say it moves 1,200lt of water a hour. I have been trying to find information about what Bar pressure is needed online, but have found nothing. Also is it possible for a Venturi pump to move 6,000lt per hour? Cheers 🍻

[@jc49fishniner4lif7]

great video like always 👍

[@COOPERSCICHILDS]

INTERESTING CONCEPT COOL VIDEO

[@PBS-nm1uu]

how long has this been around??

[@mouradbensalah9995]

pourriez vous nous montrer comment realiser un tube venturi pour aspiration d une solution merci bien

[@jamiemacdonald7374]

Now I want to make my own water changer... I sure I can make one that is more rugged than commercially available

[@landismount1746]

I am 10 and you made me want to git a fish tank and now I have two

[@user-be4yc2vr5c]

I've tried a few experiments now with this and CANNOT for the life of me get my water to bubble milky and to keep the o2 in solvent for any period of time like in some these videos =/

[@moinkhan3744]

Thank you

[@abulsar]

Awesome !

[@workwithnature]

Is this way of doing things not just very wasteful energy wise?

[@franki01mail]

But this way you can pump e.g. acid without any filters that secure the pump. Or e.g. you have a thing like frv30 - look for it at youtube. You don't need a vacuum machine, because the "brush" uses this effect to pump dirty water out, using the pressure from a pressure washer. You can see that behaviour here: kzbin.info/www/bejne/aWbZeYqnbseGhbc (I couldn't find a better footage).

[@alexgabriel1835]

Thanks

[@mrgr]

What if you have 2 to 3 times higher pressure in your main pipe then in your venturi tube, would you still be able to inject another fluid into the main pipe?

[@josephpaaccio43]

THANK YOU for your time an knowledge ,,,got it

[@azizulhakim628]

Anyone knows how to express this in mathematical formula?

[@rokinjosiah]

wow.... i just realized how my wine aerator works ........ Pow... Head explodes

[@floftyAl]

great vid, how about dont make it when you are congested and stick as fuck

[@idabtoohardidk1659]

Would you like a tissue? great explanation but made harder by listening you to recycling boogers

[@blanketstarry7725]

Are you always an ass?

[@BobWright42]

Sandfall!

[@raymundowellington6592]

Why does everyone act as a PARROT ?? Whether there is high Pressure, high Temp and high Velocity, or the three components are otherwise. Not just two and one act opposingly because it makes no sense.

[@RSP190166]

Venturi Effect will waste so much water in the fish keeping world. One will see this in there water bill. My thoughts !