Pulling Water?

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    • #273166
      Avatar photoMasterPlumbers
      Keymaster

        Can water be pulled? I usually here of water being pushed over distances. Somebody told me that
        eventually water will break down.

        Thanks

      • #287011
        Avatar photoSylvanLMP
        Participant

          What’s easier PUSHING a car or pulling it?

          In theory water can be sucked up (pulled) 32 FT BUT super pumpers can pump water in excess of over 200 FT

          Now you can do the following to make life easier.

          For example a high rise building say 47 stories @12′ per story then add say another 20 feet for a roof tank height

          Then you get a pump capable of developing 254 PSI and times this pressure 2.31 = 587 ft Approx.

          Now think about letting Nature do its job (Like YOU letting the car roll down hill) Here we have a roof tank filled with water and we let it drain BY GRAVITY. Do you realize the pressure at the bottom of this piping set up would be 253.45 PSI NOT including the FORCE if we bothered to calculate the weight of the water in this no flow piping.

          So in reality here we can use a small pipe to supply a BIG pipe with a little pump and let nature tank over…. PLUMBING is amazing HUH?

        • #287012
          Avatar photohj
          Participant

            The best pump made can only pull water 26 feet, but if it is strong enough and the piping could handle the pressure, it could push the water to the moon. Pushing or pulling a car requires the same effort and you have to have a pump that can push the water up to that rooftop tank in the first place.

          • #287013
            Avatar photoSylvanLMP
            Participant

              << Dear old Archimedes invented the screw pump to pull water from one level
              to another, essentially a dirt auger in a close fitting tube on end in the
              lower level and
              the other discharge end with the crank at the top. The mine pumps which
              used
              the
              first Vacuum engines pulled the water up in roughly 32′ stages. They had to
              because
              you couldn’t have a steam boiler at the bottom of the mine. The New York
              system is
              the best because it uses gravity. Pump the water to the roof and regulate
              the pressure
              on the way down.

            • #287014
              Avatar photoArt_xyz
              Participant

                In a perfect vacum (outer space) maximum suction lift is 33.9 ft. Here on Earth (with a good pump) appx. 32 ft.

              • #287015
                Avatar photohj
                Participant

                  In outer space air pressure is zero therefore the amount of lift is zero. If the perfect vacuum is applied above the liquid inside a sealed or otherwise closed system, then the atmospheric pressure of approx. 15# will lift it to approx 33 ft. Since that is not attainable, the practical limit is about 26 feet with normal pumps.

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