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altop 10-27-2009 11:21 PM

sewer lines
my sewer line from the house to the septic tank is about 50 years old and is spliced, patched and broken is several places. i have decided to replace the line. i have average plumbing skills, and can run a backhoe. the problem lies that i have to "reroute" the line around a house trailor that has been put in since. i am looking for suggestions/how to trips to do this. the existing line is 4" and i am planning to replace it with the same size. i just am not sure about if i can put a sweeping 90 in or have to use all 45s. i would appricate any advice.


Bob Mariani 10-28-2009 06:46 AM

Seeping 90's are fine, just maintain an even and adequate slope.

AllanJ 10-28-2009 09:16 AM

Don't forget that the added length of pipe to go around the trailer results in a greater (vertical) drop requirement from house drain outlet to septic tank.

altop 10-28-2009 06:47 PM

i went out and measured it and it is just under 100'.. i figured with the sweeps it will be right at 100'. so i would need a 1' drop over the entire line... right?

Plumber101 10-28-2009 08:03 PM

1/4" per ft or 3-4% slope

altop 10-28-2009 11:00 PM

i know this might sound like a dumb question... but what kind of pipe do i need? i know i can use standard sch. 40 pvc... is that my only option?

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