Soil stack outlet is too low for WC

[fourstardan]

I am doing a concealed wc at the moment and The existing soil pipe is too low for where the WC will come out at 180mm centre.

Current centre of the outlet is 140mm(ish)

When i minus 10mm tile +substrate ill be looking at this being 120mm.

Will 60mm offset work here or any other options other than Flexis I'm avoiding.

[mdw]

One of the offset pan connectors will help with that

[Dannbodge]

or a flexible pan connector, it's do the bend and also the change in height without any issues

[fourstardan]

Yes, I thought a 6cm one will fit but I do worry how much they work though, specially with these small cistern volumes now days.

This will be concealed so inaccessible eventually.

Trying to work out today how the original bog got plumbed In and the WC arrives today to get it into realistic perspective, I think they did a gradient run before on original build which I could do.

Why they never put it at 180 centre originally is a mystery, did 180 become some industry standard in recent years or something?

[Stegel]

Could you use one of these to give you a gentle bend upwards from the branch (or the double version if you need additional length before a shorter 90 degree pan connector)?

https://www.toolstation.com/adjustable-bend-110mm/...

[Black_S3]

You’ll probably find if you pipe it in 110 soil pipe with a 90 elbow then a straight pan connector you can hit the height no problem.

You also don’t want to be stuffing a pan connector straight into a soil socket - you need a bit of soil pipe in the socket first

[Little Lofty]

Better too low than too high. It’s not that far off, there should be some fall from the back of the pan to the soil pipe. On long runs too much fall can cause issues, as can to little, but at that point the flush should take everything away.

[B'stard Child]

Black_S3 said:

You also don t want to be stuffing a pan connector straight into a soil socket - you need a bit of soil pipe in the socket first

^ WHS - that's gonna leak down the soil stack