22mm copper sleeve through wall?

[zanwan]

If fitting an outside tap, or drilling pipework through internal walls for central heating/general pipe runs, is it necessary to have a 22mm copper sleeve, or can you simply go straight through with a 15mm pipe?

If you must have a 22mm sleeve, what is the reasoning behind it?

 

[kirkgas]

a sleeve is to protect a copper pipe from corrosion from the cement, and to perhaps allow for some movement without fracturing the pipe, a gas pipe must be sleeved, not actually sure if a water pipe must be sleeved but i always sleeve it as it takes 30 seconds longer to fit the sleeve than not fit it, and the time to drill the slightly bigger hole is minimal as well

 

[zanwan]

Thanks for the reply. I shall use sleeves based on your advise. Do you know what make i should go for when buying a 22mm drill bit. I had a look in wickes and BnQ. Wickes had them for about £20, BnQ were selling them for about £35! I seen some at an outdoor market for about £5, dont think i want to chance that.

 

[mrgas]

Use a 25mm bit for a 22mm pipe otherwise it goes wrong!

 

[londonboy]

buy an sds bit from screwfix, various ranges at various prices.

 

[bengasman]

And make sure it is long enough.

 

[bengasman]

buy an sds bit from screwfix...

Not much good without an sds machine.

 

[andytheplumber]

All metal and copper pipes that pass through a wall must be sleeved. Water or gas. So im told. And made to do.

 

[kirkgas]

All metal and copper pipes that pass through a wall must be sleeved. Water or gas. So im told. And made to do.

i dont think steel pipes need to be sleeved as cement wont corrode them

 

[kirkgas]

All metal and copper pipes that pass through a wall must be sleeved. Water or gas. So im told. And made to do.

i dont think steel pipes need to be sleeved as cement wont corrode them

now that i have re-read this post i have changed my mind and think steel pipes should also be sleeved to protect them from movement

 

[glasgowgas]

All metal and copper pipes that pass through a wall must be sleeved. Water or gas. So im told. And made to do.

i dont think steel pipes need to be sleeved as cement wont corrode them

now that i have re-read this post i have changed my mind and think steel pipes should also be sleeved to protect them from movement

kirkie,kirkie, o dear, o dear.
concrete is akin to cancer, for MI pipe

i have spent the last 20 years blanking it off, and re piping "swimming pool size " areas for heating!!!!!!!!!

 

[Nige F]

All metal and copper pipes that pass through a wall must be sleeved. Water or gas. So im told. And made to do.

With a bleedin` SDS no doubt Do it by hand with a hammer and chisel ...one from each side... up a ladder... and accurately measure from inside to out so the holes line up You`re all a bunch of Dish fitters -blowing half bricks out of walls

 

[bengasman]

...You`re all a bunch of Dish fitters -blowing half bricks out of walls

I resent that, I don't blow half bricks out, only full ones. or two's