2006-08-23 06:25:48 · 6 answers · asked by IAN T 1 in Home & Garden ➔ Maintenance & Repairs
Maximum? - vertical.
2006-08-23 06:31:30 · answer #1 · answered by rookethorne 6 · 0⤊ 0⤋
Most people think that the more fall,the better,but that's not the case.The minimum should be 1/8" per foot, and if necessary to drop the pipe to a lower elevation quickly, you'd be better off to do it with 45 degree elbows if possible, rather than a 90 degree drop from the higher elevation to the lower. Too much fall on the drainline will cause the water to run off, leaving the solids in the pipe to accumulate and eventually cause a stoppage.
2006-08-27 03:15:37 · answer #2 · answered by Anonymous · 0⤊ 0⤋
About 1:20 is a good rule of thumb. If you need to fall a greater depth then install a backdrop manhole. If youre laying a new pipe system allow for manholes at any change in pipe size, direction or gradient.
2006-08-23 06:42:51 · answer #3 · answered by dave 2 · 0⤊ 0⤋
Dont think theres a maximum as sometimes you run a vertical shaft into a cess pit.
However there is a minimum......
2006-08-23 06:35:05 · answer #4 · answered by junio130 3 · 0⤊ 0⤋
the fall should be 25 mm for every metre. if it's too steep then the **** sticks as the water falls faster.
2006-08-23 06:33:47 · answer #5 · answered by Anonymous · 0⤊ 0⤋
quater inch per foot
2006-08-23 15:01:35 · answer #6 · answered by Anonymous · 0⤊ 0⤋