What is the grade for proper drainage in water drains? I live in Western PA if that matters for any kind of codes or regulations... I have a 65' trench and have been told that the grade is 1" in 4' as well as 1" in 10'. I don't know who to believe... Are there any other questions I should be asking???
2007-12-13 00:46:26 · 6 answers · asked by slappy 3 in Home & Garden ➔ Do It Yourself (DIY)
When we do underground plumbing we always use 1/4" per foot fall. This is not only code in most cities across the country (USA) but it is optimal for sewage.
If the fall is too shallow it will not drain fast enough causing blockage, but if it too steep then the liquids run down too fast and leave the solids behind, also causing blockage.
2007-12-13 02:57:42 · answer #1 · answered by Anonymous · 5⤊ 0⤋
Certainly a 16 1/4 inch drop sounds a bit much. Number 1 offers a valid suggestion. You might as easily get answers from your local Zoning/Code enforcement agency.
2007-12-13 01:10:31 · answer #2 · answered by DIY Doc 7 · 1⤊ 0⤋
Waste lines need a 1/4" per foot drop to properly drain. Waste products will collect at bends otherwise.
2007-12-13 03:01:50 · answer #3 · answered by big_mustache 6 · 2⤊ 0⤋
Depends on local codes. Most are 1/8" per foot up to 1/4" per foot.
2007-12-13 01:54:15 · answer #4 · answered by sensible_man 7 · 3⤊ 0⤋
1" in 10 ft
2007-12-13 00:54:27 · answer #5 · answered by Anonymous · 1⤊ 0⤋
2in and smaller 1/4in 3in and above 1/8in
2014-08-18 12:28:11 · answer #6 · answered by Alan 1 · 0⤊ 0⤋