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What size hole and protection sleeve is required for a 22mm holes

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deanomc

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I will be running a 22mm plastic heating pipe horizontally through a cavity wall (inside of garage to under floorboards in living room) and need to know what width and length drill bit to buy for the job. Its my understanding that the piping will need some type of sleeve around it to protect it against rub of the bricks so the width will also need to accommodate the sleeving. Can anyone recommend a good sleeving too. Thanks. ps, I will be using a SDS drill with a clutch before anyone asks as I don't want to end up in hospital!
 
My advice to you would be don't run plastic through a wall, convert to Cu then back to plastic. 22mm tube needs a continuous sleeve of 28mm Cu tube, so you'll want a 28 or 30mm drill bit. Personally I use a 28mm dry diamond core bit as it makes a much neater hole & doesn't knock out half the wall on exit (don't use it on hammer though!!)
 
cheers Sid. Do you advise swapping over to copper through a wall to simply eliminate the risk of the plastic wearing down or is there another reason? Alternatively, I was going to surround the plastic piping with lagging so it does not touch the wall yet still allows some play but if a 28mm copper tube gives more protection then I will do this. Thanks
 
I like a nice tight hole and no protection. But that's enough about my personal life.

If it's speed fit use 32mm waste pipe and a core drill. Then silicone the ends once you have the pipe through to seal it.
 
Sid Viscous said:
My advice to you would be don't run plastic through a wall, convert to Cu then back to plastic. 22mm tube needs a continuous sleeve of 28mm Cu tube, so you'll want a 28 or 30mm drill bit. Personally I use a 28mm dry diamond core bit as it makes a much neater hole & doesn't knock out half the wall on exit (don't use it on hammer though!!)
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Why why why ????
 
If it's from garage to living space must be copper pipe and sleeve fitted with 1hr Fire rated mastic or putty. If garage sets on fire won't spread to house and set ur escape route alight.
 
Good advice! I will be doing everything to regs so does this mean that every pipe in the garage need to be copper. I have the boiler in there and was going to run plastic until 2m from the boiler but if regs say otherwise I will swap to copper. The garage is currently not in use as a garage and Ii have plans to convert it to a downstairs living room in a few years. Is it still good workmanship to use firerate silicon and copper even though it will never be used as a garage.
 
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