Upward drain

[p1lumb3r]

Kitchen drain pipes run horizontal to the main drain. Will there be a problem with drainainge if there is a diagonal upward slope (3"-4" slope) to main drain? thanks in advance

[jadnashua]

Yes...it will create problems. My unprofessional opinion. How far does it go horizontal prior to hitting the vertical?

[RioHyde]

Absolutely. Water has this thing against running uphill unless pumped.

[p1lumb3r]

Yes...it will create problems. My unprofessional opinion. How far does it go horizontal prior to hitting the vertical?

jadnashu..
thanks for the reply...from the p-trap, horizontal pipe is about 3-4 ft. before the pipe goes diagonally up (not vertical) maybe about 3-4 inches to connect to the main drain pipe...thanks..

[Gary Swart]

Water will not run up hill. A drain must slope downward at the rate of at least 1/4" per foot or 1" per 4 feet. No way around it.

[hj]

If you can convince water tp flow uphill, your next project should be to design a perpetual motion machine, because it is supposed to be impossible also. To quote someone, "Don't lower the drain, raise the sink", or vice versa.

[jimbo]

That 4 feet of pipe would always be full of water. The sink would drain very slowly.