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  1. #1
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    Default Plumbing lines to new shop

    Hi all

    Spring has almost made our area; still cool at night tonight is suppose to be in the 30's

    I'm renting a small Bobcat 331E backhoe next weekend to pull out some lyliacs other trees plus plan on running some lines to the location of the proposed shop.

    I'm hoping to have a full bathroom in the shop. I planning on running sewer lines over the the shop and coming back into the basement of the house.

    I'm just wondering what I should use for the sewer pipe 2", 3" or 4"?

    In addition how much slope needs to be in the line? It's about 200' would a grade of 6" be enough?

    Thank you again.

    Garth

  2. #2
    Elite Member CurlyDave's Avatar
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    Default Re: Plumbing lines to new shop

    I have always used 3" lines minimum inside a building for a toilet, and most places require 4" for outside lines.

    I have used 1/4" per foot as the slope on a sewer, which would be 50" over 200'.

    While I am certain it is possible to get away with less slope, and you might even be able to use a 3" line all the way, the fact that you are renting the backhoe to dig the trench tells me you should do it right the first time.
    40 Acres on a hill - fantastic view. JD 110 TLB, 4-n-1, 12" bucket, 18" bucket, Addington thumb, rock bucket (doubles as root grapple)

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  3. #3
    Platinum Member Bill Barrett's Avatar
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    Default Re: Plumbing lines to new shop

    Code and practice in Illinois would be 4" with 1/8" per ft of fall. Water has to be above sewer, or if not possible 10' horizontal separation.
    3" and above = 1/8" per ft
    Small than 3"=1/4" per ft
    Here is some info.
    Section 890

  4. #4
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    Default Re: Plumbing lines to new shop

    Getting the correct pitch of 1/8" per foot over a 200' run can be challenging for a first timer.

    Failing the first plan, another option, (if codes permit), might be a sump with an ejector pump? Then you could run a 2" line and the slope is not critical.

    If your going to run a water line below the frost line, it is going to take some time to dig 200' with a small hoe. A trencher, (if you can find one big enough), would be much faster.

  5. #5
    Platinum Member Bill Barrett's Avatar
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    Default Re: Plumbing lines to new shop

    Quote Originally Posted by ray66v
    Getting the correct pitch of 1/8" per foot over a 200' run can be challenging for a first timer.

    Failing the first plan, another option, (if codes permit), might be a sump with an ejector pump? Then you could run a 2" line and the slope is not critical.

    If your going to run a water line below the frost line, it is going to take some time to dig 200' with a small hoe. A trencher, (if you can find one big enough), would be much faster.
    I would think 200' of head is alot to ask of a ejector pump.

  6. #6
    Elite Member CurlyDave's Avatar
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    Default Re: Plumbing lines to new shop

    It is only 200 feet of run, not 200' of head.

    Actually, if code allows a second, small septic system near the shop, that might be a better answer than 200' of sewer line, especially if the natural grade of the land is against you.
    40 Acres on a hill - fantastic view. JD 110 TLB, 4-n-1, 12" bucket, 18" bucket, Addington thumb, rock bucket (doubles as root grapple)

    Not only do we not understand the universe, if someone explained it to us, we would not know what he was talking about.

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  7. #7
    Platinum Member Bill Barrett's Avatar
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    Default Re: Plumbing lines to new shop

    Quote Originally Posted by CurlyDave
    It is only 200 feet of run, not 200' of head.

    Actually, if code allows a second, small septic system near the shop, that might be a better answer than 200' of sewer line, especially if the natural grade of the land is against you.
    You are correct. I'll have to get the head for 200'. looked at average ejector pump ( little Giant ) it's 4800 gal per hour. so head would still be significant.
    Last edited by Bill Barrett; 05-12-2008 at 08:48 PM.

  8. #8
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    Default Re: Plumbing lines to new shop

    Thank you for your thoughts. I've had an opportunity to look closer at the plan. If I move a couple sheds out of the way I could cut the run to about 125'. The bad news though I think the area is lower than the house - likely a foot or more. My plan is to come in the bottom of the basement which will be close to the frost line - I don't know if there can be much of a grade and still be below the frost line.
    Do you thing a sewage pump could run down 6' and then laterally for 125'?
    Maybe the best decision is to dig in a septic tank.

    I can likely still run water and power out to the shop. I need to talk to the plumber to see if I can run a line for natural gas out.

    I have a large roll of 2" PVC. Will the code allow running each service in a different PVC run?

    Garth

  9. #9
    Platinum Member Bill Barrett's Avatar
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    Default Re: Plumbing lines to new shop

    Garth, would be best to talk to your plumber. Local codes are different. Here you would have to put in a separate tank anyway.
    Like I say about codes, I have a two days of CEU's for plumbing codes this week.

  10. #10
    Veteran Member Charlesaf3's Avatar
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    Default Re: Plumbing lines to new shop

    since you should probably be under frost line the whole way, I don't think you are going to make it with that trench. I'd put a new septic in, easier digging frankly, especially if you are still allowed to do leaching pits out there.

    4" line for septic to my mind. Are plugs really something you'll enjoy dealing with? And put in cleanouts!
    ----------------------------------------
    Charles

    Kubota B3030
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    Too many other random attachments to list (or to own, per my wife) and a really bad tool addiction. But at least I haven't bought a dump truck or bulldozer. Yet.

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