New Kitchen Waste Run Correct Pipe Size

[Bazzatron]

Hello PFM's,

I have the pleasure of doing my first waste run for a new kitchen installed in a flat and was hoping for some advice.

I need a 6-metre run to the stack where I am going to mark my 1:40/1:110 and split the difference at a 1:80 gradient. It will be discharging the kitchen sink, dishwasher and washing machine.

What pipe size would you recommend, don't have a copy of building regs. Would a 40mm pipe suffice or should I go up on that dia.?

Thanks in advance.

Baz.

 

[ShaunCorbs]

Are they going to be discharging all at the same time

Also 15mm a meter normally is around the mark

 

[Bazzatron]

Hey @ShaunCorbs

For the most part no. On occasion there could be some crossover after dinner I guess, Dishwasher on a load in the machine and washing some pans.

Cheers!

 

[ShaunCorbs]

11/2 should be fine if you want you could up the waste to 2" if you want that would handle anything

 

[townfanjon]

I ve just done a 6.5 meter run in a kitchen extension today , went with 50 mm .

 

[Bazzatron]

Thanks guys much appreciated!

 

[SimonG]

Would go with a 50mm, better safe than sorry.

 

[Darren Jackson]

50mm for any run over 4m is the norm.

 

[centralheatking]

11/2 should be fine if you want you could up the waste to 2" if you want that would handle anything

I like Shauns approach I would do 11/2 minimum but 2 inch is best ...no comebacks this way
centralheatking