Waste pipe meeting drainpipe, can they join?

[DrunkOnLust]

Hi,

I was wondering if the following is acceptable, it hasn't been done yet but it's being considered:

There's a drainpipe running top to bottom at the front of the house which goes to a combined sewer (this is what I've been told). There's a wc sited in a new en-suite at the front of the house (1st floor). If the soil pipe from the wc is taken through the wall it meets the drain pipe. Where they meet, can this section of drainpipe be replaced by a 4inch soil pipe which would then drain into the sewer? The person who wants to do this says that it will need sealing up at ground level and that the top section of drainpipe (which has not been replaced) will vent gases.

Does this sound possible/legal? I know the person should contact building control but as a concept does this sound legal?

Thanks.

 

[hi-spec plumbing heating]

and keep the top half as a drain pipe

 

[DrunkOnLust]

Uh oh, a lol smiley.. is this really a bad idea then?

 

[hi-spec plumbing heating]

yes if changing to a soil pipe you'll have to change it all the way up and change the bottom in the ground.
re-run your drain pipe.

where is the toilet waste going to now ?

 

[DrunkOnLust]

The toilet's not currently connected. It's part of a badly planned en-suite project at the front of a house in a conservation area.

I kept insisting that the drainage was going to be a problem but it all fell on deaf ears. Any idea on the likelihood of the council allowing a soil pipe to be added to the front of a conservation area house? I've never dealt with them before.

 

[memor maplin]

Nil.

 

[DrunkOnLust]

I feared as much.

Just spoke to the person who's wanting to stick the soil pipe at the front and told him to forget about it. He's asking technically why it won't work, what shall I tell him?

 

[hi-spec plumbing heating]

to be honest if he don't understand the regs on drainage he shouldn't be doing it. i'd be be bit worryed if i was you letting him loose on your house.
building control are not the best people to upset.

 

[lagunaglen]

You must inform building control of any underground drainage work, if done wrong you could be connecting into a rainwater drain.

 

[DrunkOnLust]

Thanks for the help so far- I've been telling the person about building control/regulations being in opposition to what he had planned so now he's come up with another bright idea: keeping the pipe indoors (boxed in) then connecting it to the rear soil stack via the basement. Is this any more viable, or is there anything he needs to keep in mind re regulations?

 

[ChrisR]

You need a fall of about 1 in 40 on the basement bit, plus space for the bends.
Also see building Regs Part H - online.
Only solution might be a macerator