Correct fitting for soil stack under floor

[solutions]

Why doesn't the heating engineer bit surprise me !!!!!
Sounds a good plan to me Daniel, the vent up to outside (dry part) can be reduced to 3" (75-82mm) according to Building Reg Part H but at a push it could be reduced to 2" (50mm) & it would work fine.
Take the opportunity to sort out wastes if you can, I don't like two 40mm into one.

Good luck.

your right 3 32mm would be better.
why the dislike of multiple pipes? I appreciate that as far as I am aware it is not catered for in the regs but should function all the same so long as no one tries to convert the loft and plumb a toilet in to the remaining vent. Ridge tile vents do essentially the same thing by changing the profile of the vent but supplying the same free vent area.

 

[chris watkins]

your right 3 32mm would be better.
why the dislike of multiple pipes? I appreciate that as far as I am aware it is not catered for in the regs but should function all the same so long as no one tries to convert the loft and plumb a toilet in to the remaining vent. Ridge tile vents do essentially the same thing by changing the profile of the vent but supplying the same free vent area.

Ooop's upset all the heating engineers on here again (not intended I assure you). I agree to a certain extent solutions but there has to be a limit. Would 10 x 10mm pipes be OK?
There is a difference between a single & multiples & that is the amount of friction proportionate to the surface area, along with the risk of blockage.

 

[solutions]

Ooop's upset all the heating engineers on here again (not intended I assure you). I agree to a certain extent solutions but there has to be a limit. Would 10 x 10mm pipes be OK?
There is a difference between a single & multiples & that is the amount of friction proportionate to the surface area, along with the risk of blockage.

You are not wrong. indeed I would only use such a means if it were absolutely necessary which it rarely is and then only of course on a vent portion of a stack. don't worry certainly not upset by you offering your sound advice.

 

[Centralheatking]

Centralheatking and his fellas are pragmatic and practical

New build has to be perfect thats why the QS/Architect/ etc
get paid so much.

However regarding existing buildings - of what ever age - and
when one regards the customers financial position - as long as
drains and water are left safe in our opinion that how we roll.

10x fellas x 40 years practical experience = alot in my opinion

And in case you doubt us we have done loads of medical gas, in hospitals (vac and O2) hydrogen and other rare gas in labs,

Big George (dead) and Jimbo did some submarines at
Cammel Laird and Bae at Barrow

We only really toy now CHK
Cenralheatking

 

[AWheating]

most new builds i see are far from perfect. In fact you would be mad to buy many of them sadly.

 

[SimonG]

most new builds i see are far from perfect. In fact you would be mad to buy many of them sadly.

I think you're being very generous with that statement AW. New builds are atrocious, unless its a one off. Give me an old stone house any day.

 

[spanner]

Asfor the notch I'd agree the depth is way hay out max is ..As for the diameter through the joist and discontinued waste the depth maximum is 1/4 of depth of joist maximum and 1.8m Ithink..As for venting the stack would not be a bad idea. as this causes poor runaways. Could you not removethe drain plug and use the old 100mm soil stack AAV ....