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Two motor pump / pressure tank in One deep well???

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  • Two motor pump / pressure tank in One deep well???

    Here's the problem:

    My in-laws house has their own deep well, pump and pressure tank setup. Our house which is a couple of meters away from my in-laws, does not have our own water source yet. nag tap lang kami sa pvc thats going to the other house para magkaroon din kami ng water supply. And the deep well is between the two houses.

    <image1>

    Ang question ko po mga ka PHM, pwede po ba ito (image below)?

    <image2>

    Those reds are check valves. The tank on the left will supply water to my in-laws' house and its water pump will draw power from their house. Yung setup naman sa kanan yung magsusuply sa bahay namin and yung kuryente namin ang magsusupply sa pump namin. Ang kakaiba lang ay iisa yung deep well na pagkukunan nila ng tubig. Hindi po ba sila magaagawan ng tubig halimbawang umandar yung isa lang sa kanilang dalawa. At paano naman po kapag umandar sila ng sabay, kakayanin po kaya ng pipe? im not sure sa size ng pipe. yung motor yata ay 1hp.

    Sana po mabigyan nyo ako ng advice. Thanks to all.

  • #2
    it's the same principle as the setup of our deep well at home - manual water pump with a check valve before it and motor pump, also with a check valve before it. the advice of the people who installed the deep well is that not to use the manual pump when the motor is running.

    in your case, it's also the same, when one motor is running, the other motor should not run.

    one way to do it is to use the pressure switch of each motor pump to control the power supply of the other motor pump. when one motor is running, it will turn off the power to the other motor. when it stops, it will turn on the power to the other pump. since they have different power supply, you only need to do it at one motor pump, you call this the primary motor and the other one the secondary motor.

    off hand, i can think of using a relay switch in reverse that is connected to the primary motor - when motor is running, relay switch controlling the power of the other motor is off. when primary motor is off, relay switch of the power to the secondary motor is on.

    when secondary motor is running and primary motor needs to run, them power to secondary motor is cut-off, so primary motor will run, when primary motor is finish with its job, it turns on relay of second motor to continue its job of filling the other tank. this case should not be a problem if you set the pressure switch to at least 30 psi for both water tank. most pressure switch will start at 10 psi below your full setting. this will leave about 20 psi reserve for each tank ensuring the other house will have water while the other motor is running.

    you may have to plan the wirings carefully and test it first before doing it. do share to us how you have done it so that we can also learn from your project ... cheers

    Boo!

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    • #3
      Hi Boo,

      Buti na lang pwede pala ang ganung setup. Hindi ko na kailangan mag pa drill ng panibago. I will check the pressure switch paguwi namin sa batangas. Sana DPDT yung relay/switch. Ang downside lang sa ganyang setup ay lagi "priority" si primary motor hehehe. Yung naisip ko dati ay ifeed yung state ng 2 tanks sa isang controller. Then kung alin ang maunang magsabi na kailangan ng paandarin ang motor nya, sya yung mauunang patakbuhin. Parang 1st come, 1st serve basis. Kapag napuno na yung isa, tsaka naman pagbibigyan yung isa, basta kung sino ang mauna. pero syampre di pa rin mawawala ang priority like when nagpower outage tapos pareho depleted yung tanks, pag nagrestore ang power eh kailangan paunahin talaga yung isa kahit sabay sila nagrequest. At natural pauunahin ko yung motor sa kabilang bahay.

      Ang problema ko na lang ngayon ay kung papaano ko iconvince ang biyanan ko na pwede yung ganung setup . Kung hindi ko sila makumbinsi, magpapadrill na lang ako ng bago. Salamat ng madami Boo-Semi-Retired

      Comment


      • #4
        as i mentioned, you can easily convince your in-laws through the testing that you show them ... consider the test setup scenario ... in one motor pump and water tank ... setup the reverse relay switch that will be connected to the pressure switch ... the relay controls power to an electrical outlet box ; when motor is running no power to the outlet box ; when motor is off there is power to the outlet box ... to test and convince in-laws, plug a light bulb or any appliance to the outlet and explain that that is the plug that runs the other motor ... there is no way for the 2 motors to be running at the same time with the setup ... also, very important to mention, their motor pump is the primary motor in the setup :-) he he he ... cheers

        Boo!

        Comment


        • #5
          Thanks again Boo. Balitaan ko na lang po kayo sa mga susunod na mangyayari.

          Comment


          • #6
            Here are the 2 options as Boo-Semi-Retired suggested:

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            • #7
              I dont think there will be a problem running both pumps at the same time. If you have 1hp and your inlaws has 1 hp thats only two hp. there are systems that run on 4 hp or more. The only problem youll probably encounter is if the vacuum reach the point where water vaporize instantly in that case you will have a dry running condition. The only way to find out is to try. open both delivery line so pumps can suction to the max. then run both pumps at the same time.

              Comment


              • #8
                is there an easier way of testing this 2 motors running at the same time without removing the check valve for both the water pipe?

                just thinking of the things to be done is a lot of work needed to setup the test - remove the check valves and connect the pipes again. worst is if the lenght of the coupling is not the same as the lenght of the check valve, then you have a big problem of how to connect the pipes without the check valve. if the pipes are PVC, then it further complicates how to setup the test ... cheers

                Boo!

                Comment


                • #9
                  IMO there is no need to remove the check v/v before the pumps for testing. You actually need it there all the time.
                  If you dont want to be a second priority then install a pressure switch operated relay switch for both pumps. The situation then become first come first serve.

                  Comment


                  • #10
                    thanks bukol for the inputs. however i just discovered that the mains voltage drops to less than 200vac (from ~220) while the pump on the other house is running. what more if we have two pumps running at the same time. maybe the transmission line transformer in our area is underrated or our community is drawing power more than the transformer can handle. so for the community's sake, i'll just just run the motors one at a time.

                    Comment

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