Welcome to the forum. Although you can post in any forum, the USA forum is here in case of local regs or laws

View the thread, titled "Soil pipe connections through wall underground" which is posted in Boiler Advice Forum on UK Plumbers Forums.

Planning drainage for a new bathroom. Assuming that all the falls/gradients are correct is there anything wrong with this plan? Soil pipe from toilet goes through wall below the floor level so that I can connect a shower waste (wetroom so flush with floor). On the other side of the exterior wall is the soil pipe vent (with rodding access) and an inspection chamber where it joins the underground drain pipe at a 90 degree angle.

Been through all the regulations I can find and seems ok but maybe I am missing something?

Drainage-Plan.jpg
 
You could get the shower trap pulling when the toilet is flushed
OK thanks. I've seen a fair few shower wastes connected to the toilet stack though. Doesn't the shower trap take care of this? Does this mean Building Control won't allow it? That it's bad practice or something else?

So shower waste should also go through the wall and connect to the soil pipe outside? What difference would this make to the pulling? It is because it would then be where the vent it?
 
Assuing by trap pulling you mean by siphoning. Sorry I am not great with the terms. So guessing using one of these on the stack would prevent that before the rest bend?

FloPlast Push-Fit 4-Boss Single Socket Waste Manifold Grey 110mm - https://www.NoLinkingToThis/p/floplast-push-fit-4-boss-single-socket-waste-manifold-grey-110mm/22367?tc=QB9&ds_kid=92700055281954505&ds_rl=1249404&gclid=CjwKCAjwgr6TBhAGEiwA3aVuIVC63irfqGFPNW4mWWD0VcKwH3zCq7l1JqojayUgQz2ciq4aqHBWcBoCnzYQAvD_BwE&gclsrc=aw.ds
 
OK thanks. I've seen a fair few shower wastes connected to the toilet stack though. Doesn't the shower trap take care of this? Does this mean Building Control won't allow it? That it's bad practice or something else?

So shower waste should also go through the wall and connect to the soil pipe outside? What difference would this make to the pulling? It is because it would then be where the vent it?

Normally connected into the vent stack as well though

Either that or you need to carry a pipe through so you can fit a auto vent

And yes siphoning the trap out
 

Official Sponsors of Plumbers Talk

Reply to the thread, titled "Soil pipe connections through wall underground" which is posted in Boiler Advice Forum on Plumbers Forums.

We recommend City Plumbing Supplies, BES, and Plumbing Superstore for all plumbing supplies.

Thread starter

Joined
Member Type
DIY or Homeowner

Thread Information

Title
Soil pipe connections through wall underground
Prefix
N/A
Forum
Boiler Advice Forum
Start date
Last reply date
Replies
6

Thread statistics

Created
John Williamson,
Last reply from
ShaunCorbs,
Replies
6
Views
1,813

Weekly or Monthly Email Digest

Back
Top