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Thread: main service to the house

  1. #1

    Default main service to the house

    Recently found out that on the system servicing out house we have:

    6inch main that has one, 1 inch branch (width of street) that then has a T to two meters and then then from each meter goes a 1" or 3/4" service to the each house. both houses are about 100-150 feet from the meter(s).

    because of low pressure I put in a pump (1/2 hp) and bladder tank. My neighbor gets a pressure drop when this kicks on...

    is it normal to service two 3-4 bedroon houses from one 1" pipe (black PVC)?

    thanks.

  2. #2
    Licensed Grump GrumpyPlumber's Avatar
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    a 3/4" line will service up to 2 bathrooms, laundry,silcock and a kitchen.
    for two residences this size, you'd need 1-1/4" minimum.
    You'd do well to call the local DPW and inquire.
    "The biggest regrets we have in life are the chances we never took."

  3. #3
    Forum Admin, Expert Plumber Terry's Avatar
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    Normally each house would have either a 1" or a 1-1/4" service.

    http://www.terrylove.com/watersize.htm

  4. #4
    Licensed Grump GrumpyPlumber's Avatar
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    Quote Originally Posted by GrumpyPlumber
    a 3/4" line will service up to 2 bathrooms, laundry,silcock and a kitchen.
    for two residences this size, you'd need 1-1/4" minimum.
    You'd do well to call the local DPW and inquire.
    Actually, on second thought I stand corrected...1" should be fine as long as there aren't any more fixtuires than I presumed...furthering the idea that you should call the DPW regarding the pressure.
    "The biggest regrets we have in life are the chances we never took."

  5. #5
    Moderator & Master Plumber hj's Avatar
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    Default pipe

    It was done here for years, but at least one city has discontinued the practice. Your neighbor's experience is the same as what happens when many people in a neighborhood decide to add booster pumps to their systems. If there is not enough water to feed both houses, then there is definitely not enough to feed two when one of them has a pump sucking the water out of the pipe. I think the water company could make you remove it because of the degradation of the neighbor's water supply.

  6. #6

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    Thanks everyone!!

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