Waste pipe maximum lengths to soil stack

[kyliesfanclub]

Dear Plumbers

I'm hoping to install an en suite in my bedroom. I read online that the maximum length of waste pipe to the soil stack are as follows:

WC 6m
Basin 1.7
Shower 3m

Are these correct?

I can satisfy the WC requirement, but need to extend the basin and shower distances considerably. Is it possible to do this by using wider pipe? Additional vents? Any other method?

My soil stack runs down the middle of the house, and I have access to the loft which is directly above the bathroom and proposed en suite.

All help gratefully received.

 

[kyliesfanclub]

Now I've found this on marleyplubminganddrainage.com

Frequently asked questions
Soil
What is the maximum length of waste pipe can I fit to: Sink, Bath, Basin or Shower?
Sink: No limit Bath: No limit Basin: 1.7metre for 32mm- 3metre for 40mm over 3 increase too 50mm 2 Shower: No limit All waste pipes should be fitted at gradient of 18mm per 1 metre minimum.

What's the difference between a sink and a basin? Surely it's a technicality?

confused.com

 

[Hugh Jaleak]

A sink is found in a kitchen, a basin in a bathroom or WC. If you're not too far outside of these limits you should be ok, fit an antivac trap if siphonage presents a problem.