15mm pipes with sharp right angles through a wall

[jpowell79]

Hi guys,

looking for a bit of advice on how best to run 15mm pipe for new radiators with sharp right angles on both sides of a wall.

I've just had the downstairs living room and hallway re-plastered, and chucked the old crappy rads, and ordered some nice new P+ Stelrads to go on both sides of the wall. One side of the wall is the living room, and the other side is the hallway.

What I want to do is run 15mm pipe through the wall, and then create a very sharp bend using Yorkshire equal 90-degree elbows. I want the pipes to run as close to the wall on both sides as I can get them, as they'll be running in either single or double low-profile pipe clips, and the reason I want to use these is because I want to hide the pipes behind 30mm skirting with a 20mm rebate, so so the pipes really need to be as close to the wall as possible.

It would be easy if the pipes only needed to be close to the wall on one side, as I could solder on the 90-degree equal elbow, and then feed the pipe through the wall, but to do it on both sides of the wall, would mean the solder ring is pretty much already inside the wall, so you would be just crossing your fingers that the torch got all the way round the solder ring and soldered without any issues, as it would be nigh on impossible to properly inspect it.

Anyone ever had to do something similar? Any suggestions?

 

[jpowell79]

could possibly use tectite fittings, but have never used them before and the fact they only give a 1-year guarantee doesn't fill me with confidence.

 

[Notch7]

I want to use these is because I want to hide the pipes behind 30mm skirting with a 20mm rebate, so so the pipes really need to be as close to the wall as possible

can you not chop out some of the wall to enlarge the hole so you can see the solder, as you will be covering it with skirting

maybe you could drill a biggish hole just below and then once youve soldered get down low and have a look for the solder -if you can see the telltale blob, its done it

in my experience pre soldered fittings have quite generous amount of solder so provided youve got it hot enough it would def flow out.

 

[jpowell79]

Yeah that might be my only option. It’s probably my OCD wanting to avoid making a bigger hole in the newly-plastered, freshly-painted wall, even though the skirting will hide it!

Thanks

 

[catlad]

I suggest if using new skirting you let it dry before fixing it .

 

[JohnD]

Do the most difficult side in advance so you only have one tricky joint.

If you pre-tin the pipe ends with solder, and wipe it off with a dry rag while still molten, it improves your chances of a good joint in awkward conditions.