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Thread: Advice on wells/pumps

  1. #1
    DIY Junior Member mns's Avatar
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    Default Advice on wells/pumps

    We are constructing a new home - 5 bedroom, 5.5 bath, two laundry rooms,etc. We have a well where we have a flow of 2 GPM at 700 ft. The well is 900 ft deep. We have received conflicting advice on conventional and constant pressure systems and are unable to decide how to proceed. It's a 2-acre lot so there will be a need for a sprinkler system in the future for the lawn (a portion of the lot will have a lawn).

    What would your advice be for the design of a pump/motor system for a house of this kind? The house will be about 6000 sq. ft on two levels with a finished basement of another 2000 sq. ft with a bedroom, bathroom and wet bar...

    Thanks much,
    MG

  2. #2
    DIYer, not in the trades LLigetfa's Avatar
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    You will need to go with two pumps and a storage tank. 2 GPM only equates to 2880 gallons a day and a 20 GPM sprinkler system can chew through that in a couple of hours.

    Determine how many gallons you will use to size the tank accordingly.

    What conflicting advice did you get on constant pressure systems?

  3. #3

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    You either need a second well or a deeper well.

    What flow (and at what depth) is typical for your area? Here 50-70 gpm is found at 150 feet. I've seen well drillers use the wrong bit and go over 1,000 feet only to get 3-5 gpm.

    Ask around, your driller might be the problem.

  4. #4
    DIY Junior Member mns's Avatar
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    One recommended constant pressure for this situation and another recommended conventional... which is confusing. What are the parameters we should be considering?

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    DIY Junior Member mns's Avatar
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    Can you please explain more ? What is a sufficient flow of water until which we should drill? What should I be asking the drilling contractor?

  6. #6
    DIY Junior Member mns's Avatar
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    Also, what is the difference between CSV and constant pressure pump ? Which is better and why for our situation? Can someone comment, please?

  7. #7
    Moderator valveman's Avatar
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    Do you know the static water level in the well? (Before you start pumping.) Can make a big difference on which pump you put in the well.

  8. #8
    Moderator valveman's Avatar
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    Either way you are going to need a storage tank and booster system for the kind of flow rates you are talking about. The well can only make 2 GPM. So you have to store this water over time in a tank, (24 hours = 2880 gallons) so you can use it at higher flow rates for irrigation like (12 GPM for 4 hours).

    Below is a link to a starter explanation of the different constant pressure systems. Another link is a search for threads pertaining to just one particular brand of Variable Speed type pump systems.

    And hopefully the picture will post of a low yield well with a storage tank.


    http://www.terrylove.com/forums/show...ressure-Valves

    http://www.terrylove.com/forums/sear...archid=1233667


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