Chasing basin waste and hot and cold pipe into wall

[mrbg07546]

We have some wall hung basin. And the plumber advised against chasing the pipes and waste and says the wall will lose structural stability. Thoughts?

 

[motorbiking]

What kind of wall is it? When was the house built? You don't really want your hot water pipe running in a wall like that, can't you strip the plaster back and box the pipes in?

 

[mrbg07546]

A large 1960 boring looking semi detached. It has foundation walls. It's a 4 inch wall

 

[garyo]

A 40mm pipe requires a damn big chase, and when you're running it horizontally for any significant distance that's bad news.

15mm pipes are another matter.

 

[Ian H]

Build it out with 2x2 framework.

 

[Newboy]

It's a 4 inch wall

Working practice is no vertical chase deeper than a third of the skin thickness = 33 mm and no horizontal chase deeper than a sixth = 16 mm

 

[manchestergas]

The waste will be 32mm for the sink. I'd be chasing it in all day long. If it's getting dot and dabbed there will be a 10mm ish gap between wall and board also. Pipes effectively need chasing In a very minimal amount. You can't run them external on show and why bother with a boxing in?

 

[Newboy]

32mm for the sink

32mm for a basin

40mm for a sink

 

[manchestergas]

32mm for a basin

40mm for a sink

No mate, 32mm for any sink bar the kitchen sink in a domestic property. I've been a plumbing and gas engineer for 15 years.

 

[REEMS]

I used to hate fitting those wall hung basin,s customers never thought where the pipes would go stud walls are ok coz you can just cut a section out and replace afterwards, best bet is build a stud wall if its possible.