Hi on some new new build houses I plan to first fix the up stairs radiators in 15mm copper coming up though the floor at the pipe centers for the radiator. i,e rad. length add 45mm per side and the correct distance from the finish wall. However I am debating how to feed the downstairs radiators, this pipe work is usual feed behind the dot and dab plaster. What do people find is the best way of doing this. Thanks for any advice.
Welcome to the forum. Although you can post in any forum, the USA forum is here in case of local regs or laws
Pipework for downstairs radiators on new builds
View the thread, titled "Pipework for downstairs radiators on new builds" which is posted in Air Sourced Heat Pumps Advice Forum on UK Plumbers Forums.
Yes. Short price of 15, then reduce down to 10mm. Never be tempted to tee off 10mm, it won't work.
10mm for downstairs rads and 10mm for up else it just looks wrong/odd or even better 15mm for up and 15mm for down
no he means get as close a you can to the rad and use a 15-10 reducer and go from there
yea but more work chase the pipes in and use either plastic or 15 mm coated copper
i like the word used to 😀 no one should be using 8mm these days for heating circuits/ runs to rads
theres no reason ytou couldnt use 8mm but its a lot of trouble using two sizes just do it all in 10mm of manifolds
if its upstairs then through the chip straight into valve, down stairs hole in plasterboard with elbow on 10mm pipe behind the plasterboard to get it as tight as possible, of-course all pressure tested before hand, but you never know with spreaders if you pipes are going to be where you left them
yea and no, thats how most people i seen do it thats why i like to do everything in 15mm +. and depends on what the builder wants see a few just drop it center of rad straight down and then others bring it down in a corner and either behind the skirting or higher than it
There are several ways and each has its own benefits. The neatest and quickest is 10mm plastic into 1st fix triangles. The best would prob be 15mm copper coated or wrapped fitted inline with the valves, and alternative would be 10mm copper and chrome pushfit rad valve elbows, that would be nester than 15mm. As for upstairs go up the dab and out so when finished they look the same as downstairs.
You will get 15mm pipe behind most dabbed boards.
If you use 10mm as a rule if thumb upsize as soon as possible, but keeps each flow and return under 5m if it's plastic pipe.
You will get 15mm pipe behind most dabbed boards.
If you use 10mm as a rule if thumb upsize as soon as possible, but keeps each flow and return under 5m if it's plastic pipe.
Thanks for the replies. Sure I have seen it done dropping 15mm pipes down in plastic in the corner of the wall were the rad is to be then the pipes are swept/ bend so they run just above the skirting board. ( to avoid nails). Then elbowed out in copper. The pushfit elbow is just chased in to the wall. Does his sound right?/ acceptable?
Not a good idea to fit a plastic elbow or any plastic fitting in the dab void, if the plasterer incases the fitting and pipe next to it in board adhesive it's grab ring can be stopped from biting down on the pipe correctly. Seen it on a job the other week, 5 grands worth of damage to a new property.
You also need to be able to detect the pipe with a wall scanner, you can use trace tape of course but it's just as cheap and safer to drop in copper inline with the valve or in the middle of the rad, either of these positions is easy for the owner to remember the position of the pipe work.
You also need to be able to detect the pipe with a wall scanner, you can use trace tape of course but it's just as cheap and safer to drop in copper inline with the valve or in the middle of the rad, either of these positions is easy for the owner to remember the position of the pipe work.
J
JCSPLUMBING
The way I've done it is tee off the 15mm at the wall and run up behind the dot dab in 10mm and elbow out with 10mm, 90 degree copper tails into the rad. IMO upstairs should look like downstairs.
Make sure you check the fittings before you put the copper tails in as they can get caked in dab mix. I think when it's done like this it looks neat and tidy
Make sure you check the fittings before you put the copper tails in as they can get caked in dab mix. I think when it's done like this it looks neat and tidy
no easy do it right the first time and chase them in prob take 2-3 hours to chase all of down stairs rads in with multiple drops
in coated copper and you know you centers of valves bring them out about 2 - 3 inches below and once dry lined and plastered soldered elbow and short piece done
whats your trade james ?
Not much room for error fitting these if your pipe is coming straight from the wall... I always think new builds look smart when they bring the plastic out behind the Center of the rad & then flex into the valve with one of these fittings!
if you know your valve dimensions it should be easy and there will be alittle movement unless the plasterer dabs the end.
the new build way does look good, just have to take into account that it can be dangerous on very small rads as kids can knock the rads off the brackets very easy.
the new build way does look good, just have to take into account that it can be dangerous on very small rads as kids can knock the rads off the brackets very easy.
Official Sponsors of Plumbers Talk
Reply to the thread, titled "Pipework for downstairs radiators on new builds" which is posted in Air Sourced Heat Pumps Advice Forum on Plumbers Forums.
Similar plumbing topics
- Question
- Deleted member 117153
- Air Sourced Heat Pumps Advice Forum
We recommend City Plumbing Supplies, BES, and Plumbing Superstore for all plumbing supplies.
