Angle to wall for long toilet soil pipe

Possom

If a toilet is located about 2 metres from the external wall through which the soil pipe is to go, how much of an angle should be put on the soil pipe?

What would be the minimum angle?

Thanks.

ceredigion

40 to 1
.....

Possom

ceredigion wrote: »

40 to 1
.....

Not sure what you mean. Do you mean 40 degrees?

SailorSam

http://www.wyre.gov.uk/info/200316/building_control/166/basic_guide_to_calculating_falls_and_gradients_for_drainage

andyhop

40mm per metre

If its a straight run you could get away with a little less.

Possom

andyhop wrote: »

40mm per metre

If its a straight run you could get away with a little less.

It's a straight run.

Do you mean drop the pipe by 40mm from the horizontal for the first metre length?

Furts

andyhop wrote: »

40mm per metre

.

This is not so. The accepted Build Reg guidance was always 18mm min per metre which works out at 1 in 56. If you go too steep you risk problems here.

EssexExile

As Andyhop says 40mm per m so a drop of 80mm over your 2m run, which coincidently gives you an angle of about 92.5° when it meets the soil stack which is the angle that connectors are made at.

27col

EssexExile wrote: »

As Andyhop says 40mm per m so a drop of 80mm over your 2m run, which coincidently gives you an angle of about 92.5° when it meets the soil stack which is the angle that connectors are made at.

You beat me to it. The angle is 92.5 degrees and this is the angle of the soil pipe connector. If you go any steeper you run the risk of solids being left behind because the water is flowing too fast.