Connecting 40mm waste to concealed cistern soil

3 Feb 2008
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United Kingdom
Hi all,

I have a Bauhaus concealed cistern and frame, and need to connect a 40mm waste pipe from 2 basins.

Here's the setup:

The WC pan will connect to a 110mm soil pipe coming straight up from the floor. The cistern comes with a 90 deg fitting that goes from 110mm plain end at the bottom, to a smaller diameter push fit connector. This 90 deg pipe clamps to the frame and receives a straight pipe that connects it to the pan.

Here's the question:

Can I join the floor soil pipe to the 90 deg bend with a straight coupler that includes a 40mm boss to take the basin waste in horizontally? Looking at standard pan connectors that include a 40mm boss, they all seem to have the 40mm pipe enter downwards at the top of the pipe, and not sideways. Is this because you shouldn't enter the 40mm at the side?

Many thanks,

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Those bent pan connectors with the 40mm spigot are not always used in the upright/vertical position - and are often used in the horizontal position - whereby the entry would be in a similar position to what you want to do... you gotta do what you gotta do!
The only other possibility would be to run 40mm in parallel to the 110mm and then join them both to the vertical stack if you are above ground and have one.

DIYnot Local

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