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  1. #1
    Join Date
    Jun 2012
    Posts
    81

    Default back to back 90's or 45's to get down deeper

    ok so my ground work plumbing has been istalled, inspection tomorow. i nedd to get the main sewer line deeper. it leaves the addition with proper coverage but then at 3' out the existing grade changes and doesnt leave enough coverage on the pipe so i want to get it deeper. currently the pipe passes thru the foundation and then 2' out has a clean out then a piece is just stubbed out 3' (plumbing inspection only does 5' past building)
    my question is= is it better to use long sweep 90's for a vertical drop or is it better to use 45's for this? i am concerned the 45's would allow the liquid to leave the solids since it would be greater then 1/4" per foot....

  2. #2
    Join Date
    Feb 2010
    Location
    South*East
    Posts
    1,168

    Default Re: back to back 90's or 45's to get down deeper

    Use 45's. There is far less chance of a stoppage with 45's as compared to 90's.

    John

  3. #3
    Join Date
    Jun 2012
    Posts
    81

    Default Re: back to back 90's or 45's to get down deeper

    excelent advise- i was worried even with long sweep 90's it would be too dramatic on flow, i will advise him to use the 45's with a short section of pipe in between. thanks.

  4. #4
    Join Date
    Feb 2012
    Posts
    92

    Default Re: back to back 90's or 45's to get down deeper

    Yeh 45's is the best route to go.

    Ben Franklin Plumbing Salt Lake City
    372 D St
    Salt Lake City, UT 84103
    (801) 416-3522

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