I'm confused about what the minimum gradient is for a waste pipe I'm planning to install.
Looking at the table of minimum gradients in the approved document H it seems to give a minimum gradient of 1:80 (min. 1 WC) for 100 mm pipe as well as the minimum of 1:40 that seems to be the standard answer given here.
I'm hoping to install a utility room and downstairs toilet, so the waste pipe would serve a toilet, two sinks and a washing machine. It would involve an eight metre run to the waste stack. Is this practical to achieve and would it be appropriate to use the 1:80 figure?
Many thanks,
Colin
Looking at the table of minimum gradients in the approved document H it seems to give a minimum gradient of 1:80 (min. 1 WC) for 100 mm pipe as well as the minimum of 1:40 that seems to be the standard answer given here.
I'm hoping to install a utility room and downstairs toilet, so the waste pipe would serve a toilet, two sinks and a washing machine. It would involve an eight metre run to the waste stack. Is this practical to achieve and would it be appropriate to use the 1:80 figure?
Many thanks,
Colin
