Length of Branch Pipe.

[JohnyVegas]

Hi am helping a friend who has a project under way. He has planned a re -positioned kitchen. This means a branch run for sink/washing machine waste to a soil pipe fitted with an air admittance valve. Query is the run will be in 40 mm and about 4.5 meters from soil pipe. Am i right in thinking the maximum branch for 40mm is 3 meters,, Will building regs worry about this or is there an alternative. Thanks.

 

[Agile]

Its a bit long but unlikely anyone will worry.

However you should ensure screwed in-line access points should be provided for rodding.

The fall should be about 60 mm per meter.

Tony

 

[doitall]

Approved Document H, is free to download

 

[JohnyVegas]

Approved Document H, is free to download

Thanks, I downloaded it and where I got 3 meters from. If I am reading it correctly.!!!!

 

[Nige F]

Can you get 50mm pipe in ( behind the units) if anyone asks say ..."Monkey did it" eh Johnny

 

[JohnyVegas]

Can you get 50mm pipe in ( behind the units) if anyone asks say ..."Monkey did it" eh Johnny

Heh Monkey Liar - he did it honest mr Inspector.... Am I right in thinking if go up to 50mm for most of the run - i can go to 4 meters and be within part H with a fall of 18 -44 mm per meter.. Thanks for persistance

 

[muggles]

Correct, use 50mm for as much of the run as possible then reduce for your final connection to your appliance as close as is practical

 

[JohnyVegas]

Correct, use 50mm for as much of the run as possible then reduce for your final connection to your appliance as close as is practical

thank you..then this will be the way and Mr Inspector will be happy (if he ever looks)!