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Thread: Please help with pump selection

  1. #1

    Default Please help with pump selection

    Please help me choose the appropriate jet pump.
    I have one 3rd floor bathroom, two 2nd floor bathrooms and two 1st floor bathrooms. The kitchen and laundry are also located on the ground floor. Id like to have no less then 30psi available for the 3rd floor bathroom. My limited choices are a Goulds J7S, J10S or J15S. The only other pump brands commonly available here are: Eurostar and Speroni, hence my Goulds choice.
    I will have a 300gal above ground storage tank feeding the pump and either a 44gal or 62gal pressure tank.

    I've never installed something like this before so any other tips would be greatly appreciated.

  2. #2

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    It sounds like you have a very large home, so I'd go with the J15S. While all three pumps may attain the necessary pressure, the J15S will give you more volume, which you may need with all the bathrooms.
    Ron

  3. #3

    Default

    Thanks Ron for the quick response.

    The house isn't exceptionally large. Just lots of bathrooms. The house actually won't get lots of use but when it is used it will be full of people. I'm guessing you would also recommend the 62gal pressure tank as well?

    Also, here's a dumb question. Should make a shelter around pressure tank and pump to shield them from the elements or can they be out in the open?

  4. #4

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    Yes and Yes. Go with the larger pressure tank, and it always helps when the pump and tank have some pretection around them.
    Good luck!!
    Ron

  5. #5

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    Thanks Pumpman,

    I'm ready to order all the correct parts now.
    I think everything should be up and running in about a week.

  6. #6

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    You guys will love this: maybe this is a scenario for the CSV with a tiny tank, and the CSV fed by a submersible inside the storage tank. No need for pump house or pump shelter. Mount the tank and valve against the big tank to keep them from freezing. I bet you can get the submersible on **** for 150 bucks and it should well outlast any jet pump and use less power.

    Since your static storage tank is only 300 gallons, It does not do much for storage. I would possibly skip it and feed your system directly from the well which hopefully has a submersible already in it.

  7. #7
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    What is the reason for the 300 gallon tank? Do you have a low yield well?

    bob...

  8. #8

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    Raucina

    The house is located in the Philippines so freezing is out of the question. Low 60s is cold here.

    Speedbump

    Actually there is no well. The towns municipal water system will feed the supply tank. The reason for this whole setup is because the local water system is very inconsistent. Low water pressure is a daily occurrence and no water for one or two days at a time is not that uncommon either.

    Actually, I am interested in a CSV. I just wouldnt be able to get one here for several months.

    I just thought of another question. How can I get the pump to shut off before the supply tank completely empties?

  9. #9
    In the Trades Bob NH's Avatar
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    Quote Originally Posted by weekender
    Raucina

    The house is located in the Philippines so freezing is out of the question. Low 60s is cold here.

    I just thought of another question. How can I get the pump to shut off before the supply tank completely empties?
    You can put a float switch in the tank, like the float switches that are used in sump pump systems.

    A 1.5 HP pump is pretty large for such a float switch, so you might need a large relay such as a "definite purpose contactor". They are available for less than $20 in the US. If you have access to equipment from Grainger www.grainger.com , I can suggest a catalog number if you tell me your operating voltage.

    You should also have a float valve in the tank to keep it full automatically when there is water.

  10. #10
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    Here in the states the city water pressure is always 200 psi.

    A CSV is always a good idea.

    BobNH answered the question on shutting the pump off and keeping the tank full. I can go one better and make all this happen with low voltage so the control circuits would not be dangerous.

    bob...

  11. #11
    In the Trades Bob NH's Avatar
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    Quote Originally Posted by speedbump
    BobNH answered the question on shutting the pump off and keeping the tank full. I can go one better and make all this happen with low voltage so the control circuits would not be dangerous.

    bob...
    It's called a transformer that is $9.95 in my Grainger catalog, and select the contactor with a 24 Volt coil.

  12. #12
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    Mine is about the same price, but it plugs into the wall and is self contained.

    bob...

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