Vacuum break valve

[Paul205]

Dear All,

If I have not got an open stack pipe directly behind a downstairs toilet, under what circumstances do I need a vacuum break valve for the toilet.

The existing first foor toilet is open vented via a stack pipe which feeds into a new common chamber.

Kind Regards





Paul

 

[Paul205]

anyone?? I need to know if I require a vacuum break valve

 

[Richardthe3rd]

The Regs state any WC must be within 6M of a soil vent pipe Paul.

 

[Paul205]

Richard, Firstly many thanks for you help.

There will be two foul pipes, the existing which is vented through the roof and a new pipe which is connected to the existing via a chamber, please see the photographed sketch.

I would appreciate your thoughts on my particular installation

//www.diynot.com/network/Paul205/albums/

 

[Richardthe3rd]

Richard, Firstly many thanks for you help.

There will be two foul pipes, the existing which is vented through the roof and a new pipe which is connected to the existing via a chamber, please see the photographed sketch.

I would appreciate your thoughts on my particular installation

//www.diynot.com/network/Paul205/albums/[/QUOTE]

That's fine Paul, however you could fit a small stub stack if you so desire & even a Durgo valve on top of a stub stack.

Mr Google is your friend......

 

[Paul205]

Richard, I am extremely thankful for your help, I have tried google but cannot really find the specific answer to my question. If I get this correct, you are saying that based on my sketch I do not need an air admitance valve??

The reason I ask is I don't want to see one in my beautiful new toilet room!! I also have the connection straight into the foul pipe in the footprint of the toilet making fitment of any valves very difficult.

 

[Richardthe3rd]

Richard, I am extremely thankful for your help, I have tried google but cannot really find the specific answer to my question. If I get this correct, you are saying that based on my sketch I do not need an air admitance valve??

The reason I ask is I don't want to see one in my beautiful new toilet room!! I also have the connection straight into the foul pipe in the footprint of the toilet making fitment of any valves very difficult.

That's correct, it's within 6M of the SVP so no other vent/stub stack or Durgo is needed. However, if you fit a wash basin, you'll need a vertical stub stack for the waste pipe from that or it'll pull the basin trap when you flush the bog....

Golden Rule of drains; air behind water!!!

As a general rule the soil vent pipe is fitted at the head(high point)of the drain

 

[Paul205]

thanks for this Richard, you help has been very greatly appreciated. thank you

 

[Richardthe3rd]

thanks for this Richard, you help has been very greatly appreciated. thank you

No problem, I'm OK on drains but anything of a personal nature I'll pass on.........