Sheathing Copper Pipe through Wall

paperclap

Hi all,

On my quest to redo our home’s central heating system, I need to pass some 15mm copper pipe through brick wall.

I understand it isn’t a requirement to do this, but also understand it is good practice… especially when considering the effects masonry can have on copper.

I had initially planned to sheathe both the flow and return pipes in 22mm copper pipe… but this would ultimately mean the total “height” would be 44mm. When the 15mm pipes are out of the sheathing and running along the wall, the talon clips won’t denote the pipes to be that far apart.

What is best practice? Maybe even sheathing in plastic pipe?

Thank you!

Bendy_House

Sheath it in anything, even duct tape

Surely plastic pipe will also be 44mm total width? But, yes, plastic pipe is also ideal as a sleeve.

In you have any concerns about noise - creaks/ticks - then also wrap it in material, a strip of old bed sheet, anything...

Are you planning to fill in the hole around it with mortar/filler afterwards? And might you want to withdraw/rotate/move back and forth the 15mm pipes at any point?

grumbler

laurencewhymark said:

I had initially planned to sheathe both the flow and return pipes in 22mm copper pipe… but this would ultimately mean the total “height” would be 44mm.

You can have two 22mm holes distanced horizontally and approx 15mm (centres) vertically.

When the 15mm pipes are out of the sheathing and running along the wall,

I hope you mean under the floorboards, not exposed above the floor.

Section62

grumbler said:

When the 15mm pipes are out of the sheathing and running along the wall,

I hope you mean under the floorboards, not exposed above the floor.

Solid floor - IIRC

Section62

laurencewhymark said:

What is best practice? Maybe even sheathing in plastic pipe?

Plastic would be better IMV.  Metal on metal isn't a good idea where you have the potential for movement, which you will on a heating system.

I can't say it is best practice, but more than once I've used a short length of 40mm plastic waste pipe - warmed up with a hot air gun and then 'squashed' to make it more oval in shape before it cools down and sets in that shape, ready to be cemented into the wall.  Think 'oval conduit', but on a larger scale.

The end result is a hole large enough for two 15mm pipes one above the other.  My horse agrees this is a reasonable practical solution if nothing more suitable works or is to hand.

Another_Level

21.5mm plastic over flow pipe can be used as a sleeve on 15mm copper pipe, make good drill hole breakout with polyfilla.

Talon do link spacers, talon hinge over clips are great 

FreeBear

Another_Level said: 21.5mm plastic over flow pipe can be used as a sleeve on 15mm copper pipe, make good drill hole breakout with polyfilla.

20mm plastic conduit is the perfect size for 15mm copper pipe.

Another_Level

FreeBear said:

Another_Level said: 21.5mm plastic over flow pipe can be used as a sleeve on 15mm copper pipe, make good drill hole breakout with polyfilla.

20mm plastic conduit is the perfect size for 15mm copper pipe.

If purchasing a length from a diy shed, Overflow is cheaper. Every penny counts 

FreeBear

Another_Level said:

FreeBear said:

Another_Level said: 21.5mm plastic over flow pipe can be used as a sleeve on 15mm copper pipe, make good drill hole breakout with polyfilla.

20mm plastic conduit is the perfect size for 15mm copper pipe.

If purchasing a length from a diy shed, Overflow is cheaper. Every penny counts 

https://www.screwfix.com/p/floplast-overflow-pipe-white-21-5mm-x-3m/68593 - £1.28

https://www.screwfix.com/p/tower-round-upvc-black-conduit-20mm-x-3m/7980p - £1.96

OK, you win that argument. But conduit is useful if you're doing any wiring...

paperclap

grumbler said:

When the 15mm pipes are out of the sheathing and running along the wall,

I hope you mean under the floorboards, not exposed above the floor.

We’re in a bungalow with concrete floors and solid brick walls. No floorboards to easily hide pipes under unfortunately!

So, I either leave them exposed, or chase them into the wall. Chasing is a hell of a lot of work.

When going down the “exposed”, the vertical pipework will be boxed in however. But yes, horizontal pipework will be exposed.

531063

As said duct/insulation tape