10mm speedfit in walls.

[spikewt]

hello

i'm after a few opinions really to get some idea which way to approch a job.

Im estimating for a full heating system from scratch. The customer has warm air heating but its just been condemned so no rads anywhere. They are happy to have rads but done want any pipework on show so the idea is to chase 10mm plastic into the the solid walls and come out behind the rad. So no joints it the wall and no precise measurments for rad tails. I'll run silver tape behind so they can be identified with a detector.
problem 1 ; plasterer cant guaranty it wont crack which i can see his point so will some sort of pipe rap or tubing solve that. i was thinking about the sort of pipe conduit you use for underfloor heating between rooms.
Problem 2 : they live right next to a field to natrually they get mice so the loft has to be copper. the idea is to connect a 10 to 15 speedfit elbow then staight into copper for everything in the loft.
Problem 3 : They want either a storage combi (probably viessman 222-f) or boiler and unvented cylinder (viessman again.) The incoming main is 15mm but not bad flow or pressure plus its right near where i need it to be. Iv only ever ran from 20 or 25mm incoming mains so im curious if anyone has been sucessful with 15mm? theres a big jacuzzi bath to fill so thats my concern plus they like a good shower.

Feedback would go down a treat.
thanks very much

 

[SafeGasInstall]

system boiler and 25 mdpe to run unvented cylinder ,I dont like plastic and I dont like the idea pipe in the walls !
can you not lift up floor boards to run in copper ?

 

[spikewt]

Its a bungalow with solid floors. I showed them the pipe conduit ya can get like electricians use designed for 15mm. Thier faces said it all. thats why i needs to hide the pipes.

 

[SafeGasInstall]

i personally understand you , but for the customer I dont get !

they happy to chase the walls and make right mess but not willing to have the pipe work on drops !

Did bungalow last year full install all on drops ,unvented and system boiler in the loft worked wonderful

 

[spikewt]

well that was my argument. Iv told them that the best plasterer in the world aint gonna be able to feather in a chase and make the wall look like its never been touched. i think that went straight in one ear and out the other. when you look in the bungalow though, i can understand why they dont want pipes on show. Its abit like a show house.

 

[SafeGasInstall]

get a camera and take photos off there faces when you start chasing the walls will be right fun

 

[PlumbBobBob]

i like 10mm buried in walls for radiators. especially when the custard doesn't know it's there and go to put a picture up and go straight through the pipe with a nail lol. very lucrative for me!

 

[GQuigley67]

are the walls thick enough to raggle out enough for a conduit for the pipes to be able to expand and contract in ? and where it comes out the wall have a bigger hole with one of those chrome clips that hide the hole ? so they can expand without cracking the plaster. I know it aint ideal but what else can you do

with 10mm pipes your looking at 15mm/22mm pipe for a conduit

 

[spikewt]

there are plates that you can buy for the pipes to come out the wall. the just make an ugly hole behind the rad look abit tidier. I,v found some 22mm conduit that will take two 10mm pipes and the chasing machine will go deep enough.
due to the size and cost of the job im going to buy them a pipe detector then the silver tap behind the pipe shows them where the pipes are.

 

[GQuigley67]

thats what I mean cover plates that clip around the pipe