fall angle of soil pipe

[Mark]

Is there a minimum fall angle of a soil pipe from a toilet to main soi

pipe? Thank

-- Mark

[Lobster]

Needs to be between 18 and 90 mm fall per metre of pipe

David

[Michael Mcneil]

90 mm in 1000? Thats nearly 1 in 10.

Put the pipe in so that the bubble on a metre spirit level is on one of the lines. That will give it -if I remember correctly, something like 1 in 400.

[Lobster]

Well fine, but it will be outwith current English building regs, and I rather assumed that was the point of the question??

David

[andrewd909]

are published there including drainage, its quite suprising how much there is on something that at first glance seems as simple as drainage

[The Natural Philosopher]

1 in 60 to 1 in 100 is recommened fo pipes laid in the ground.

IIRC its a bit more for internal bog pipes.

[Peter Stockdale]

If I remember correctly that would be a factor of 10x incorrect. S.b. One in Forty. For small non underground runs such as the o.p. is enqiring about a steeper fall is commonplace.

Pete