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harry harry is offline
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Default Slope on bath drain pipe.

On Oct 1, 6:16*pm, Michael Chare mUNDERSCOREnews@chareDOTorgDOTuk
wrote:
I plan to install a new upstairs bathroom toilet, basin and bath. All
three items will be on the same exterior wall. The basin is between the
bath and the toilet.

If I connect the bath drain to the toilet soil drain pipe, outside just
below the bath, *a distance of about 8 foot, how much slope do I need?

Is it OK to connect the basin drain to the middle of the above pipe or
should I have a separate connection to the soil pipe? The latter option
would certainly prevent any water from the basin trying to enter the bath..

--
Michael Chare


The optimum slope is 1:30. but not critical for wash basins. (Steeper
rather than shallower)
Separate connections are better. There's less chance of one trap
"sucking the other out"
Be sure to install cleaning points in the pipework so you can clear
out any future blockages. Or use some compression fittings that can
be parted for this purpose.