when installing an outside tap

[FoRiS HeAtInG]

Does the 15mm copper pipe running through the wall need to be sleeved? And also is a single check valve fine to use if there is not enough space for a double check?

Thanks

 

[Clint 1979]

Yes the 15mm copper pipe will need to be sleeved to protect it from the building materials (bricks and cement) corroding it.
I normally drill a 24mm hole and use a length of overflow pipe as a sleeve, then seal it with silicone once the pipe is fitted.
Also you can get garden bib taps with double check valves built in to them for under a tenna.

 

[Plumbstar Tom]

needs to have isolation to it and a double check valve

 

[FoRiS HeAtInG]

Thanks, I know that many choose not to sleeve it and you find in many places that they haven't done so. I always thought it was because of the detraction of the wall when the wall expands and detracts

 

[plumben]

Always fit iso valve then double check as the tap might be replaced on the future for one that hasn't got a double check

 

[Plumbstar Tom]

Thanks, I know that many choose not to sleeve it and you find in many places that they haven't done so. I always thought it was because of the detraction of the wall when the wall expands and detracts

Yep so drill a hole slightly bigger than the overflow pipe, circa 24mm.

 

[FoRiS HeAtInG]

Ok that all but sums up my question makes perfect sense, so that would apply to any pipes going through brick wall apart from barrel pipe?

 

[Geyser]

I've used filling loop valves if tight for space.

 

[Mike Jackson]

Yes the 15mm copper pipe will need to be sleeved to protect it from the building materials (bricks and cement) corroding it.
I normally drill a 24mm hole and use a length of overflow pipe as a sleeve, then seal it with silicone once the pipe is fitted.
Also you can get garden bib taps with double check valves built in to them for under a tenna.

Bib taps with built in double check valves are not compliant with the water regulations for new installations, they can only be used to replace an existing similar tap. On all new installations the DC valve must be within the building as external valves can be susceptible to frost damage.

 

[Clint 1979]

Bib taps with built in double check valves are not compliant with the water regulations for new installations, they can only be used to replace an existing similar tap. On all new installations the DC valve must be within the building as external valves can be susceptible to frost damage.

Well there you go, I didn't know that.......thanks MJ
Every days a school day

 

[kirkgas]

Client the double check valve must go inside to comply with water regs
Just seen mikes post

 

[armyash]

I don't think I have ever seen an outside tap installation that is fitted to comply with water regs after reading this.