Push fit soil waste pipe arrangement through a wall

[julesPP]

Hello,

Some advice please

I have a plastic push and fit 110mm soil pipe just installed. I am slightly concerned as the joins are inside the wall. I think it is much better have a one solid pipe straight through the wall and through a cavity wall as if it happens to leak it be either on outside or by toilet connection and not inside cavity wall? At the moment the 92 degree (elbow) bend join is just inside the outside wall and the pipe through the cavity wall (at slight angle up) ends just before the internal wall and connected through push and fit connector to another pipe to connect to the toilet.

How good are push and fit connectors - can they leak or is it unlikely? Should I get this corrected to a safer arrangement so any potential leaks can be easily addressed?

Cheers Jules

 

[Newboy]

It might just be the angle of the photos but the branch doesn't look right:

a) Is it fully home in the socket (of the lower section of the stack)?
b) Is the horizontal branch being forced up to meet the WC connection?
c) Is that the final position of the stack once it's clipped to the wall?

The branch section should be continuous through the outer and inner leaf - don't stop it inside the cavity.

As long as the pipe is prepared (especially chamfering and lubricating the ends before fitting to a socket) and fitted correctly then there is no issue having the branch joint inside the brickwork.

 

[julesPP]

It might just be the angle of the photos but the branch doesn't look right:

a) Is it fully home in the socket (of the lower section of the stack)?
b) Is the horizontal branch being forced up to meet the WC connection?
c) Is that the final position of the stack once it's clipped to the wall?

The branch section should be continuous through the outer and inner leaf - don't stop it inside the cavity.

As long as the pipe is prepared (especially chamfering and lubricating the ends before fitting to a socket) and fitted correctly then there is no issue having the branch joint inside the brickwork.

a) I think it is fully home
b) horizontal branch is being forced up slightly - maybe 5 degree slope give or take 1 or 2 degrees.
c) it is the final position.

I believe the pipe been prepared with chamfering and lubrication (looks like it as in first photo on the lower join)

 

[Newboy]

a) I think it is fully home

Need to be sure!

b) horizontal branch is being forced up slightly - maybe 5 degree slope give or take 1 or 2 degrees.

Not good and you probably don't want to bury it in the wall like that

I believe the pipe been prepared with chamfering and lubrication

Again you need to be sure - if the chamfer isn't right then the seal can be pushed out of place.

The branch section should be continuous through the outer and inner leaf - don't stop it inside the cavity.

Probably the most important bit

 

[Plumbman1979]

If the joint on the branch was outside the externsl wall then the soil pipe would be stood off the wall too far.
The branch joint is always just inside the wall.
First pic not sure what thedark ring is round the pipe? Its either not fully home and its the bur or its a smear if silicone grease which is fine