plumbing question (sewer)

[spooner]

Q 1 what is the corect drop rate for sewerlines?.
Q 2 im not sure about venting i have every thing in a line the tub to the tolet a bout three ft the toylet goes derectly to the sewere main then from the other side about another three ft i have the bathroom sink then i have a tee that goes about six ft too the washer and that runkeeps going about 15 ft too the kitchen sink. is one vent on the kitchen end enugh? will the over flow in the tub be enuf to keep the trap from going dry.thanks hope this makes sence :whazzup:

[IDWITHELD]

I have waste lines at work that are 1/8" per foot. But that was for industrial DI water treatment.

Anyone else?

[bigwiz]

4 can be 1/8 per foots every thang smaller is 1/4 in

[Duckwheat]

1/4" per foot. I just did a job in my basement. You can check on line for plumbing codes.

Duckwheat

[1pump]

I've always heard 1/4"-ft.

[StickFish]

Only thing I know about sewers is that water runs down hill and when you work on sewer lines - DO NOT CHEW YOUR FINGER NAILS!