110 mm solvent bend instead of push-fit

[Possom]

I'm going to have a 110 mm soil pipe emerge from a wall within a kitchen roof cavity (indicated in green in image), this then emerges from kitchen roof and connects to external stack.

I presume there's any point in having an access port on the 92.5 degree bend (indicated by red arrow) since there's no hatch in the kitchen ceiling to access it. The branch section at the stack will have an access port in any case, so I hope this would be sufficient.

I had intended to use a push-fit single socket bend at this point (pic A below), however after learning on the forum recently that weld-fit fittings are best to use in concealed areas instead of push-fit fittings, I'm not thinking it would be best to use a solvent-weld bend instead (pic B below). Pic B shows a double socket bend since I think it would have to be this to weld at both ends of the bend.

I'd appreciate any comments on this, in that, if you think this is the correct way to go. Thanks!

A)

http://tinyurl.com/yaastlbz

B)

 

[Ian H]

Yes, B is a glued one and A is pushfit.

 

[denso13]

I wouldn't be worried using either of them. A lot of stacks are not accessible but use push fit.

 

[Possom]

but use push fit.

Okay. I had thought solvent weld were the more secure in terms of preventing leaks - important when located in an inaccessible location.

 

[Hugh Jaleak]

With soil pipework, provided the joint is made properly with ring seal fittings, and the pipework is adequately supported to prevent any movement, it's highly unlikely to ever leak unless disturbed. Wastes are a different matter, always use solvent weld waste where it cannot easily be seen or accessed.