New build first fix help needed

[ShaunCorbs]

Any particular reason the pipes couldn't come out from floor straight in to valves on the first picture

i mean straight up from the floor in 15mm copper seems pointless putting them in the wall when you don’t have to or am I missing something

guess customer didnt want to see the pipes

 

[Sharp Point]

Yes mate 10mm I have done it with 15mm from a loft void as below , but the first post was a refurb on two flats above a shop the walls were dot and dabbed over with insulated plaster board then skimmed there are no joins other than the manifold in the hallway cupboard just made sense as the floor voids were insulated with rockwool the boards put back , 10mm ply laid on top then a plank type vinyl flooring laid. Kop

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Nice neat work KOP, did you have sore neck from crouching and bending doing that?😱

 

[king of pipes]

Nice neat work KOP, did you have sore neck from crouching and bending doing that?😱

I survived bud not a big fan of plastic I will only use hep2o , as I said before with all the layers of floor materials and the walls being insulated I though that was best joins in the pipework were kept to a minimum and pipework was all hidden away . Kop

 

[Toby emery]

Take 15mm in the ceiling then use 2 x 15mm elbows with 10mm reducers above where the radiator is, then take the 10mm to the rad positions using a junction box to hold them in place. No fittings in the wall, make sure you nail clip the 10mm to wall with hair felt behind the 10mm for protection against the block work.

It works perfectly, been doing it for years and never had problems with flow rate.

Also it can be 1 zone as under 150m2. Part L 2014 got rid of that rule. Over 150m2 must be zoned.

 

[Riley]

All new build must be zoned

 

[Toby emery]

No, not since April 2014.

 

[ShaunCorbs]

No, not since April 2014.

Yes they do also in Wales sprinkler system must be fitted

 

[Aire]

No, not since April 2014.

That depends on house size and it doesn't say zones aren't required, it's says trvs at a minimum are deemed acceptable for zoning.

 

[Toby emery]

Yes if it’s over 150m2 it’ll need to be zoned and controlled by two different room stats linked to 2 port valves.

Well yes Trv’s are a must anyway, but being 110m2 it doesn’t need to be zoned via 2 port valves which is what people are implying by saying all new builds must be zoned.

 

[Aire]

Yes if it’s over 150m2 it’ll need to be zoned and controlled by two different room stats linked to 2 port valves.

Well yes Trv’s are a must anyway, but being 110m2 it doesn’t need to be zoned via 2 port valves which is what people are implying by saying all new builds must be zoned.

Yes so if your below 150m2 then trvs only are fine. That's the way I understand the regs anyway.

 

[Knappers]

I like pipe-in-pipe down the walls (and my Hilti wall chaser), does anyone else do that?

 

[Ryooo]

In regards to new builds requiring zoning I'm working on a Cala development with a minimum of 5 bed house and not one house type is zoned. Where as the site i was on before was 1/2 bed social housing and was zoned. Zone 1 was living room, kitchen, bathroom & hall. Zone 2 bedroom. Seemed pointless to me at the time.

 

[Aire]

In regards to new builds requiring zoning I'm working on a Cala development with a minimum of 5 bed house and not one house type is zoned. Where as the site i was on before was 1/2 bed social housing and was zoned. Zone 1 was living room, kitchen, bathroom & hall. Zone 2 bedroom. Seemed pointless to me at the time.

Has any house been finished/signed off yet? I'd bring it to the developers attention, remember that if your installing the systems, it's up to you to make sure they comply with the latest requirements.

 

[Ryooo]

Has any house been finished/signed off yet? I'd bring it to the developers attention, remember that if your installing the systems, it's up to you to make sure they comply with the latest requirements.

Yeah mate, there a into the 3rd phase with other 100 houses signed and handed over. The system is ASHP with hyprid boiler with an unvented indirect cylinder. I've not asked the agent yet but i think it's more to do with SEDBUK rating witch CH zoning obvisouly improbe as does ASHP. I'll find out more. I'm in Scotland also which might make a difference.

 

[OffshoreGas]

Burying pipes in a wall is expensive in both the short and long term.

Short term you haven’t got space to properly insulate them meaning a fair portion of your heat will be lost into walls/brickwork.

Long term you’re going to have to rip the room apart if ever you need access.

I dug about 50m of heating pipe out of the wall in our last house and ran properly insulated under the floor. Saved us about 20% on heating bills.

If it were my forever home I’d be avoiding plastic pipe if at all possible.

 

[Coby kenny AGUILAR]

Have been sadly let down by a plumber and doing the first fix for a new build. I have questions regarding the correct procedure for chasing in pipework behind what will be dot and dabbed..

Its 3 bed bungalow with 9 radiators in total.

I was planning on running lagged plastic22mm flow / returns in the roof space to and tee off 15s for each radiator. Some of which are underneath windows.

1. How deep do you usually chase when its being dot and dabbed? And do you also just take a notch out of the wall plate?

2. Would you chase one larger channel and run both pipes in the same place?
Does the plastic need to be insulated or ducted in some way so it could potentially be removed at a later date?

3. The rads will be attached to chrome.. would compression fittings with liquid ptfe be ok to use to connect the chrome to plastic? But obvioulsy this wont be able to be removed at a later date without pulling the wall apart.

4. How would you chase it in? Straight line down the wall with an elbow at rad pipe height?

Finally anything else ive overlooked / missing? How would you usually approach this job?

Thanks in advance for any help

1. Speak to the boarder usually around 15mm cavity, I wouldn't cut through any wall plates joist hangers ect.. Take the most direct route, keeping joints to a minimum

2. You can insulate pipes in a wall chase but there might not be any meat left on the block, example a 22mm pipe with 13mm lagging with an extra 5 mm to cover over the pipe would be a 40mm deep chase, in ceiling voids I insulate if it's being chase in the wall I don't, ducting is a good idea and is great in a concrete floor wouldn't use it in walls unless it was a data cable for a shower that has a processor

3. I prefer to solder on chrome, file the chrome off make sure it's very clean and solder an elbow onto it with clean copper, and push the copper into a couplin, that's the only time I put an extra joint in the wall

4. Find the most direct route, but keep away from where people hang pictures, where door hinges are (I had a chippy put a 4 inch screw!! through a heating pipe), you're normally OK though) avoid where the skirting will go.

I use hep20 and test 1.5x working pressure for 45mins. 10 bar for 45mins where pressure is not know yet (new water main ect..) waivin suggest 18 bar with no appliances connect but I have yet to try this for good reason lol I trust there push fit caps but not that much