Help required with moving wc and connecting into cast waste

[bigdek]

Turning my wc 90 degrees onto different wall.

Dont want to use elbows and box in waste so i will be coring a new hole

through to the outside wall.

problem i have is the soil stack outside is cast (3 1/2 inch i think ) and

the new pipe will be 110 mm plastic.

How can i tee into the cast ?? and what do i seal up th old waste pipe

with ??

Wont be able to connect into the original pipe that comes through the wall

as the new pipe is closer to the stack so the angle is different

 

[kevplumb]

get a rubber connector from drainige centre

 

[bigdek]

will i need 2 ?

Ie . Cut away section of cast and replace with 110 mm t and rubber on either end ??

 

[brumylad]

The easiest way I know to solve the two issues you have would be to cut the cast soil stack off about 18 inches above the ground and replace with plastic.

You could try turning the cast swept tee fitting used by the old wc through 90' but this might be impossible if the tee is a good fit in the hole in the house wall as the cast stack will be held tight to the wall. Also the old tee will be held in place with caulked lead.

 

[kevplumb]

you can get a branch in rubber
dont look very good tho