How to fit a 15 mm rad valve to 10 mm microbore pipe

Have a microbore system? Find fitting 15 mm valves or fittings to it a problem? Here is the easy answer.
Buy the correct reducers here, using my Amazon link. amzn.to/2Mag3vF
I also now have an Amazon storefront for all plumbing parts. It is www.amazon.co.uk/shop/dereton33

[@stevesstories1420]

Hi as a novice DIYer with plumbing I have used a lot of your videos, this one was so helpful to explain how to fit (in a simple way) the reducer. I don't normally comment on KZbin, but just wanted to take the time to say thank you so much for this help and information and there are lots of people out there like me who need/want help. Thank you

[@dereton33]

Pleased to have helped you, I am just trying to take the mistery out of DIY in that, any one can do it.

[@malcolmosborne1592]

Cheers. Watched this previously and now watched again for another job

[@dereton33]

No problem.

[@barbarybar]

Radiator changed, plus new thermo valve fitted. Thank you.

[@dereton33]

Excellent!

[@blunder1591]

I always cut the olive half way with a junior then get a mains tester screwdriver in the groove and twist it nearly every time the rest of the olive will split

[@TheDervMan]

No idea these things existed! Great stuff, thanks for sharing.

[@dereton33]

No problem.

[@Paul-mw4gy]

Thanks for filming this, had the kit but no idea how to fit it until watching this 👍🏻

[@dereton33]

No problem 👍

[@worrun1505]

MicroBORE -> i bet it was lovely to install back in the day but it's a complete nightmare for us replacing or connecting up to it! haha, great video

[@dereton33]

Ha ha thanks, Yes complete sh..t stuff.

[@JamesJones-jy8vs]

@@dereton33 Hi, could you elaborate on your comment please . I've got 10mm microbore throughout my house for the central heating system, the system appears to be working fine ( heats up quickly) and I found 10mm quite flexible ,easy to bend with a bending spring. The problem lies with needing to reduce the fitting down to 10mm ? Thanks for your video. James

[@JayKay-ht8rg]

Nice to see the Mrs getting involved. (If that’s who it was!) Another very helpful video. Thanks buddy.

[@dereton33]

Yes it was thanks Jay.

[@JayKay-ht8rg]

dereton33 👍🏼👌🏼😊 You come across as a lovely bloke mate. Wish you both all the best.

[@MrMagsimus]

Thanks mate u are a life saver ! I got this damn kit and didn’t have a clue how it was gonna work .. I understand now thanks to you 👍❤️👌

[@dereton33]

No problem.

[@pinhead1990]

You've opened up new potential options with this, thank you!

[@dereton33]

You're very welcome!

[@davidwaldie6227]

Brilliant. I'm about to re-fit a new bathroom suite at home and this was my last query. Towel radiator can be ordered now :)

[@dereton33]

No problem

[@mattybrown5657]

This guys voice is well cool nice video fitting new rads to 10mm pipe system will definitely get some reducers for it

[@dereton33]

No problem Maty

[@NAFO_Badger_Brigade]

Thanks for the video - really clear and helpful. I've noticed when I cut the 10mm olive that on some of the pipes it's very close to the top of the pipe whereas on yours it was about 10mm from the top of the pipe.

[@dereton33]

It should be about 10 mm

[@NAFO_Badger_Brigade]

@@dereton33 Thank you so much. I've swapped all my radiator valves over now, refilled the system, cleared an air lock and all working beautifully. Thanks

[@lyngriffin2150]

Wish I had seen this 4 years ago - thank you 😊 helped at long last 😘

[@dereton33]

Glad it helped!

[@jasoneverett705]

Thank god!! Thought I'd wasted £13 on the wrong valve! Nice and clear explanation; thanks. Just need to find somewhere open that sells a compression reducer now that we're in lockdown mode.

[@dereton33]

Good luck JASON

[@JamesJones-jy8vs]

Another methodical video. Thank you. Been buying 10mm Rad valves,not much choice and no one advised me about that little and inexpensive adapter? until I seen your video! much more choice now :) Keep up the good work :)

[@dereton33]

Thanks James

[@rubberneck2]

Thanks for putting up these videos. They are really useful and informative. Very much appreciated 👍

[@dereton33]

Glad you like them!

[@mikerees8726]

Perfect video. Nice and clear and to the point. Just what I needed.

[@dereton33]

Glad you liked it!

[@paulrowley7233]

Many thanks, your videos have helped me out many times, top man.if I see you in the warren in Sept I'll get you a pint.

[@dereton33]

Looking forward to that Paul.

[@1flu1]

Good video. Those reducer kits don't come with any instructions. Appreciate your help

[@dereton33]

Glad it helped

[@stevemorbey]

Thanks for making this video! I’ve been wondering if this could somehow be done for ages! 🙂

[@dereton33]

No problem

[@mitchellshallcross1369]

Wow, massive help thanks. No clue they existed.

[@dereton33]

No worries!

[@mikewhiskee3498]

This just came in very useful on a Friday afternoon! Cheers mate

[@dereton33]

No problem

[@carwynroberts6946]

Thanks! this has really helped me out

[@dereton33]

No problem!

[@RichardFrith]

Thank you so much for this video, very much appreciated! That's my project for the bank holiday lined up :-)

[@dereton33]

Good luck with it Richard.

[@MrSwanley]

I find the junior hacksaw method of removing an olive - or even full size hacksaw method - _very_ easy. As you say, you don't try to cut all the way through, and you must take care not to nick the copper pipe. The goal is to cut enough of a slot in the olive that you can get a flat bladed screwdriver in there and turn it. The olive is very soft and breaks easily at the cut line, and is then easily removed. I've done it lots of times and never damaged the pipe. I wouldn't think of wasting money on an olive puller.

[@dereton33]

Thanks for the info .

[@anthonylaird1297]

Thanks for the info really made it easy to understand.

[@dereton33]

You're welcome!

[@alanfarnworth3805]

brilliant, thanks for sharing, just what I needed :)

[@dereton33]

You're welcome!

[@garrynutter860]

Thanks, Was wondering how they worked.

[@dereton33]

No problem 👍

[@Station9.75]

You can buy olive cutters for anyone who doesn’t know.

[@dereton33]

Thanks.

[@fitigued]

Excellent video. Many thanks :)

[@dereton33]

Thanks Mike.

[@deadcell4837]

Very helpful, thank you sir 👍🏻

[@dereton33]

No problem.

[@apache16789]

After a tough week of listening to clueless politicians babbling on about suspect Russia behaviour in Salisbury and very suspect push-me pull-me Brexit behaviour with Brussels, it is a real pleasure to listen to an expert who knows what he is talking about.

[@dereton33]

Thanks for your kind comments Apache.

[@mattybrown5657]

I live in Salisbury lol

[@errickmagar3928]

Beautiful tips 👍

[@dereton33]

No problem.

[@davidclarke4040]

Hi Al nice tip mate

[@dereton33]

Thanks David.

[@TheGines1979]

Nice one 😊

[@dereton33]

Thanks 😄

[@tbagsnr2386]

Perfect mate just what i needed - thank you

[@dereton33]

No problem theo.

[@meejhgggg]

Ways help me😁 thx

[@dereton33]

No problem.

[@StevePhillips]

That answers my previous question about Compression Reducing Set - 15mm x 8mm. I was going to use the size 15 olive as well but, you threw that away and didn't replace it with a new one so maybe no need for it. Does it only need the small olive size 10mm? My kit of course is 8mm reducer. Therefore, maybe the same principle. You have a nice helper good camera work too. Have subscribed to you. I'll share the video on my FB Thumbs up!

[@dereton33]

Thanks Steve.

[@mtvoss7595]

Brilliant video 👏👏👏👏👏

[@dereton33]

Thank you! Cheers!

[@lazymofo66]

Thank you, this was very helpful

[@dereton33]

No problem

[@Trev740]

Great informative video, thank you

[@dereton33]

No problem.

[@booshallmighty]

This looks different to what I have, I have the Danfos trv. Came with the reducer didn't have another peice like you had. So I use an olive too?

[@booshallmighty]

Update, I got advice from my brother, he just said put a bit of gas paste on the seat of the reducer. Tightened it up and all good. Still find it hard to believe this works. It feels solid. Feels like wizardry, just belive tho, it works m

[@yamiman6629]

Great info. Love your vids.

[@dereton33]

Thanks a lot Tom.

[@frze5645]

Hi - do you have any knowledge of the one piece reducers? In your video you show a two piece with one end going into the pipe and the other piece slipping onto the pipe with an olive between. I purchased a reducer that is one piece only (had me scrathing my head) - there is the piece to fit in the pipe and on the other end the piece that fits over the pipe... but as it comes as one piece, no place for an olive?

[@dereton33]

Don't worry, it will still work, 👍

[@bradleykuhlmey9748]

I'm having issues with some microbore reducers at the moment. Do you have to use that olive with it? Because I bought some with no olive, just the reducers, but it looks like both those parts you've got there are in one. Can't seem to get them to seal though. I've had conflicting advice too, someone said tighten them up just a bit, and then IF they're leaking tighten them a bit more (Seems backwards?). Someone else said tighten them up until you feel them crack and keep going until it's tight. That means the bottom half of the fitting is then clamping down onto the pipe...like an olive. But neither seem to be working. Any help would be greatly appreciated.

[@dereton33]

Try using some boss white potable water paste, on the reducer.

[@edwardchester1]

I've bought some that have the same one-piece reducer and also can't work it out. Did you find the solution?

[@SteS]

I have a question. I've 15mm rad valves that I'm burying the pipes coming of it in the wall. Is it okay to do a 15mm pipe from the radiator valves to (15mm elbow joint and then a 15 to 10mm reducer, these two joints will be buried in the wall) to then insulated microbore pipe which goes of to the flow and returns. Thanks.

[@dereton33]

Yes that will be ok Stephen.

[@SteS]

@@dereton33 thank you. Just what I wanted to hear. To only have one joint in the wall I was looking for 15 to 10mm 90° reducing elbows but they're only available in the US. Do you know if such a thing exists here in Europe?

[@ScottyDog345]

Iav ebeen looking everywhere for this question and answer.All systems Go!!!!!!

[@ratchriat1716]

enjoyed the video.

[@dereton33]

Thanks Ratch.

[@yorksfilm]

Cheers man👍

[@dereton33]

No problem 👍

[@PensiveCashew]

Thanks for the video, really helpful. You mention potable boss white. I've got Fernox hawk white (non-potable) will this do or do I need to get water hawk?

[@dereton33]

That will be ok.

[@PensiveCashew]

@@dereton33 Cheers! Not sure why I bought the non-potable stuff a while ago, and now just worried as it's a combi boiler. I'm guessing the rads and the hot tap water are on different pipes otherwise my tap water would be sludgy!

[@simac8640]

Useful vids Al but am confused about the olive. First you see how to remove the old one. Then disregard the 15mm valve one, then you attach the reducing kit..but in the next shot There's an olive. Am I missing something? Cheers.

[@dereton33]

I forgot to show the bit putting on the olive.

[@teabagshakur832]

thanks m8 yu are a legend !! helped me out big time :)

[@dereton33]

Any time!

[@delcrichton1]

or use an olive cutting tool?

[@steves1460]

Good video. Can these reducers be used with speedfit plastic pipe?

[@dereton33]

Unfortunately not

[@thewestonfront]

So useful, thanks

[@dereton33]

Glad it was helpful!

[@davidgraham754]

Your videos are excellent fella. Very, very helpful. Thank you. I have a question - I've got a tiny leak coming from a connection where I have one of these. I've drained the system and taken the pipe out of the valve for a look. The top part of the reducer comes right out of the lockshield valve, still on the pipe. Should I just try and pull it off to expose the olive and then wrap some ptfe round the olive and tighten it all back up? Thanks again mate

[@dereton33]

Yes take it right off so you can see the olive then either wrap some PTFE tape around it or paste it with boss white.

[@davidgraham754]

Some man. Thank you very much

[@teh_raab]

Do you still use PTFE on the thread or does the olive do the job? Great content by the way :)

[@dereton33]

The olive is good enough Rob.

[@jbaillie01]

I’ve just done this meathod for towel rail but can’t stop it leaking on 1 side. Will try boss

[@SteS]

Was it boss or not? I was hoping to try it out.

[@MJ-ou8xl]

Hi Dereton, can you reuse reducers to replace a TRV on an existing reducer?

[@dereton33]

Yes .

[@peterwormald7114]

Great info, I'm fitting a radiator/ towel rail with right angled valves i.e. From the wall, is the sequence the same?👍🏻

[@dereton33]

Yes the same.

[@worrun1505]

do the microbore come in 8mm too in older houses?

[@dereton33]

Yes it does.

[@worrun1505]

converting 8mm to 15mm, i've used compression before but wondering if they come in push fit (havent found any though)

[@dereton33]

No very unlikely.

[@worrun1505]

Gap in the market there Al ;)

[@richardstevenson7696]

Hi Al, love the videos- just what I needed. Thanks! How would you recommend converting 8mm pipe to 15mm rad valves?

[@dereton33]

Use a 8 to 15 mm reducer.

[@richardstevenson7696]

dereton33 Cheers!

[@kevinhancock4064]

Handy tip when I change out our kitchen rad ill likely do this as ots a temp small 9ne and not currently therm controlled ......I have not so great 8mm microbore 2 questions if I may (love your vids by the way ) clear everything. 1 is can 8mm pipe be replaced with 15mm ? Or is it in place to help boiler cope more efficiently? Obvs new boipers have 15mm but a little more advanced etc Second question is for my dad h3 wants a tap out his back garden its a terraced house and kitchen and toilet are towards the front of house so no obvious pipe work to tap into at the rear how would you personally go about it ? Thank you

[@dereton33]

8 mm can be replaced with 15 mm. It`s efficiency will not be effected. Take it out through the loft, drop into a room at the back of the house (try and find a cupboard to hide it in). Then through the wall.

[@kevinhancock4064]

@@dereton33 so through first floor joists or attic ?.thanks for your reply btw I think they have a toilet downstairs and I believe bath etc upstairs

[@johnmelling9950]

When you put the olive on the old copper pipe, do you need to clean the pipe with wire wool or is it fine to just leave it as it is?

[@dereton33]

It`s fine as it is.As long as it is not painted.

[@DamienDrake2389]

Great video thanks! Is it a similar thing for plastic pipework?

[@dereton33]

You have reducing sockets for plastic.

[@DamienDrake2389]

@@dereton33 that's great thanks for your help!

[@grahamogilvie2509]

Hi found your channel just in time. Currently fitting replacement TRV's to my radiators, and I had bought the one piece reducer 15mm to 10mm. However when I removed the old olives with a borrowed olive splitter, there is a distinct impression around the pipe where the old olive had been. Would this require to be cut out or would the reducer combined with jointing compound be able to make this up.

[@dereton33]

The reducer with compound will do it.

[@grahamogilvie2509]

@@dereton33 Thanks for the quick response, I had visions of having to extend some of the pipework just to get to a new bit of pipework. You saved me from having to crawl about under the floor. One other question if you can please. As there is no olive as such with the one piece reducer. Where would you apply the compound. would it be on the pipework and around the fitting?

[@paddy9021]

Hello, these reducers are just what I need so I followed the link to amazon and bought a pair. What I got was a one piece item not the 3 pieces you demontrated. Will what I have do the same job with just one piece or have I got a mystery?

[@dereton33]

Yes it works just the same.

[@paddy9021]

@@dereton33 Thanks for the reply, but in the video you use an olive (assume 10mm) that makes sense as the valve nut will crush the olive and hold the pipe in the union. with my one piece reducer there is no olive.......hmmm.....what grips the pipe and forms a seal? I can't be that stupid (perhaps I am?) but what stops the pipe falling out? what makes the seal in the valve union using this one piece reducer?

[@botany500kojak]

I have a small leak from a reducer (15mm>10mm) with no olive. Should I put a new one on? If so, how do I get the bottom part of the reducer off the pipe? cheers.

[@dereton33]

No you will not get it off, just undo and wrap some PTFE tape around it then retighten.

[@BABYCHAOS26]

You can get olive pullers or olive cutters but the average DIY person won't have them.

[@dereton33]

Yes I know, that is why I never mentioned them. Thanks for the info though.

[@franciscofernandes4527]

Hi dereton thank you for the video can you please tell if I have to cut the 15mm x 10mm internal reducer? Thanks again

[@dereton33]

No cutting.

[@franciscofernandes4527]

@@dereton33 Thanks,how do i split in 2 pieces .

[@funksoulbrother3620]

Good video. A question for you: how do you use a single piece reducer in a similar way? cheers Andy

[@dereton33]

It is the same.

[@dannymactheatreoflife.1771]

dereton33 how is it the same when there’s only one piece?

[@nazrahman8635]

@@dannymactheatreoflife.1771 I found out today the hard way. Once you put it in the valve and tighten the screw it goes into 2 pieces.

[@Birtybasset1765]

Thanks for this. Will this work with plastic 10mm pipes?

[@dereton33]

Not plastic no.

[@steves1460]

dereton33 You can use with plastic pipe, but they recommend copper olive as opposed to brass. It’s just a compression joint at the end of the day and JG’s website confirms co oression joints can be used with their products. Regards

[@nb1]

I have the reducer ok, but for some reason the nut will not get close enough to actually do up on the thread.

[@dereton33]

Is the ring the right way round.

[@nb1]

@@dereton33 thanks for your reply. Worked it out in the end, the adaptor i had already had the olive on it. My mistake was using the separate olive which made the nut sit to far away from the trv thead. Your video still helped no end. Thanks.

[@danielowens186]

Hi Dereton, I've used one of these one piece reducers and no matter what I do it leaks. I want to replace it with the 3 piece one like you've used. Any tips for removing the old one piece reducer?

[@dereton33]

Can be tough to remove the inner part that fits into the inside of the fitting. A small screwdriver can prise it out. The olive will require sawing off.

[@danielowens186]

@@dereton33 cheers. I got it off and replaced it with a 3 piece reducer. No more leaks

[@zacsayer1818]

Does the 10mm pipe need an insert when using a compression fitting?

[@dereton33]

No.

[@terrywilliams6705]

Hi, would this work in a cloakroom where the pipes coming from the wall are 10mm and I want to install new taps where the connectors are 15mm? Thanks.

[@dereton33]

Yes you can convert the pipes to 15 mm at any time using these reducers in couplings, valves, ect.

[@CuntyMcGinty]

Why do you have to drain the system? why can't you just turn it off at the mains and perform the maintenance

[@dereton33]

You can if you want to get flooded out.

[@barryholbrook9390]

Can i use this idea to fit plastic pipe into a 15mm TRV? Would I just need a pipe insert or also an olive?

[@dereton33]

You will need the insert and olive.

[@barryholbrook9390]

@@dereton33 thank you

[@cryptodan8848]

Olive cutter

[@dereton33]

Junior hacksaw, or a puller.

[@SteS]

Blow torch to help take off the olive?

[@dereton33]

It will do.

[@SteS]

@@dereton33 thanks. Don't need to do it but just it in case it ever comes up.

[@otoolepw]

what if it’s a concrete floor and 10 mm pipe is coming out curved from stud wall!

[@dereton33]

You will have to knock some of the stud wall out until you reach a straight piece of pipe.

[@ScottyDog345]

Olive pullers £25

[@dereton33]

Knock it off with a hammer. FREE.

[@jonathanchera4822]

Hi can it be done to 8mm thanks

[@dereton33]

Yes .

[@jonathanchera4822]

@@dereton33 thanks have you a link to buy them

[@dereton33]

No only the 15 to 10 mm. You may have to visit a plumbing store for those, but do try Amazon or Screwfix.

[@wollywotsit]

My last house had microbore, I was not a fan

[@dereton33]

The worst stuff ever.

[@rfjgmail3452]

Not heard of an olive splitter or an olive puller to get compression olives off copper pipes? Sorry, but your no plumber.

[@dereton33]

Ha ha that made me laugh. You don`t need those stupid tools, which I do have by the way, perhaps I should send you a copy of my city and guilds plumbing certificate, dated 1971 and only obtainable after 5 years apprentiship. Do get some pratts on here.

[@johnmanchester8528]

Nice Reply 💯