How Should I Protect New Pipe Through Wall From Corrosion?

[2point8ghiax]

This weekend, I intend to plumb in a new outside tap through the wall of my utility room. I understand that I need to protect the copper pipe from corrosion due to contact with bricks/cement.

A friend says just wrap the pipe in black electrical insulation tape before pushing it into the wall. He says it will act as a barrier.

Is this good enough? What would a plumber do to protect the pipe in this situation?

Many thanks.

 

[kevplumb]

use a sleeve for a start piece of plastic overflow pipe and seal the outside with silicone or similar

 

[2point8ghiax]

Thanks. What size hole would I need to drill? The friend who advised me lent me his 16mm SDS, which would have been fine with the insulation tape method. Will see if he has a bigger drill size if needed.

I take it his method of protection is a non-starter?

 

[kevplumb]

not exactly more not good practice

get a 25 mm bit but pilot it first

 

[PEDANTICVINDICTIVEMAN]

Knock down the wall and build a pipe ducting around the pipe, first class job and creates employment

 

[kevplumb]

 

[Nige F]

Can`t disagree with the old hands - but protection from frost/drain down . and double check valve to prevent backflow are more important considerations . I never sleeved mine