New En-suite planning help

[stockdalem]

Hi All,

I'm new to the forum but was after some advice on an en-suite that I am planning on installing. I live in a 3 storey house and am want to put an en-suite on the top floor. This is almost directly over a bathroom on the floor below.
My question is around the soil pipe and making sure I am doing it properly.
The current soil pipe is internal with an air admitance valve fitted. I want to extend this pipe up through the floor and take a branch off for the new toilet and then extend the pipe and put a new air admitance valve on extending the soil pipe over the heighest drain point. I will box in the soil pipe again once it is extended.
I have attached an image of what I plan to do.
Some words of wisdom would be much apreciated. Bacially, am what I am planning OK to do, so should it be done another way?
Mike

Untitled

• stockdalem
• 10 Jan 2011
• 1

 

[Richard C]

Assuming you already have another open vent on the foul drain system to take account of positive pressure then I can’t see any problems with it.

I assume you are aware that constructing a room with a w/c is controlled building work & subject to Building Notice submission (fee involved) & your LABC will most likely want to inspect the installation before they issue a compliance certificate. There are also several Building Regulations you need to take account of including maximum unvented lengths/falls of soil/waste pipes, extraction fan, and possible sound insulation of stud partition walls if the loo is next to another habitable room (includes another bedroom but not the bedroom the en-suite serves) and any electrical work in a bath/shower room must be done, tested & certified by a Part P electrician; there is the possibility of DIY if you notify but TBH it’s not worth the hassle.

 

[stockdalem]

Thanks very much for your responce. My house is a bit strangle, its a newish (8 year old) middle of a three terrace building. The room I am going to put the en suite in should have originally had it installed and is a room off the main bedroom. (it was not installed as new because there was a change of resident just before the build was finished and he had a shower room on the ground floor instead, which was later removed and a WC put in instead)
Luckily we dont use the bedroom on the top floor at the moment so I can take my time installing the new bathroom!!!!
I have also looked into build regs and an going to ring the building control office to understand if they want to inspect it.

The only other point you maybe able to help with, is you comment about assuming you already have an open vent on the system into the foul drain. My house does not at all. Is there a chance one of the houses each side could and I am connected to that, or is it possible that I dont have one at all? Sorry if that sound like a stupid question but I'm rather curious now.

Many thanks again for your help

 

[Richard C]

The only other point you maybe able to help with, is you comment about assuming you already have an open vent on the system into the foul drain. My house does not at all. Is there a chance one of the houses each side could and I am connected to that, or is it possible that I dont have one at all?

So has your property never had an it’s own open vent? It’s possible that the design of the drain system serving the terrace takes this into account but if you or the previous owner replaced the only open vent with an AAV then you may already be in contravention of BR’s.

It depends how the foul drain & its connections are constructed & what your neighbours have or may do in the future. If you’re at the top end of the run or the neighbours upstream of you don’t have an open vent, there is still no facility to ventilate positive pressure. It can also get tricky if everyone on the run decides to fit a Durgo in the future so it’s always best to have at least one open stack on individual properties! You need more information regarding your shared drain system & if in doubt check with your LABC if they will allow an AAV in your case.