Hep2O through an internal brick wall

[Mr Fizzion]

When installing Hep2O through an internal wall, is it necessary to protect the pipe in any way?

I'm putting 22mm barrier pipe through a 25mm hole in the brick.

TIA

Mr F.

[Doctor Drivel]

It must be sleeved.

[Mr Fizzion]

With what? What is the name of such a product? Or shall I just put a small length of 28mm pipe in the hole?

Mr F.

[Doctor Drivel]

Yep. The next sized pipe up, preferably in plastic. Or, use cheap overflow pipe.