Soil pipe issue

[trevorbayliss]

I have two questions on a soil pipe install:

1) Internally i am running the soil pipe in boxing, but i cannot exit in a straight line out through the wall as there is a change in wall line on the outside.

So i need to turn 90 degrees left then 90 degrees right to exit through the wall and then i hit a 90 elbow with access hatch on the outside.

Will i have blockage problems with this set up ? I can fit an access bend inside the property as well on my left/ right set up. I enclose a photo for the inside.

2) In the photo with my mate holding the soil pipe you can see the wall is a curved one. IS it better to run the soil pipe in one continuous piece and make it so it sticks out further from the wall where it goes into the building. OR do i go with the curve of the wall and i think use a 135 degree bend in the middle. OR maybe an adjustable bend.

 

[trevorbayliss]

Forgot to say internally from the toilet it is a 3.4m run approx with a 13cm fall. So it is about a 1:25 fall

 

[Hugh Jaleak]

With that sort of fall internally you have a fair chance of the contents of the pan being pushed through the bends, and whilst not ideal, you may get away with it. I'd keep the Access Points externally though, opening one of those on a blocked run internally isn't going to end well....

Externally, I'd put a bend in, and keep it running parallel with the wall, otherwise you may find the pipe is coming through the wall at the wrong angle and you'll have fun connecting up internally.

 

[trevorbayliss]

Went well on the wall today. Got it tight using an adjustable connector.

Sorted out the bend situation inside and used 45 degree bends instead of 90. So it should be fine.

 

[trevorbayliss]

Couple photos

 

[trevorbayliss]

Deleted and put into seperate question

 

[Nige F]

Answered