waterline size into new home from existing well

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    • #275437
      jcotter

      I’m building a new house where an old one burned and will hook up to an existing well which has a 3/4″ metal supply line underground which I would like to tie into with PVC pipe. My question deals with splitting or teeing off from existing metal pipe with two supply lines going to 2 water heaters. Will the initial 3/4″ supply line (40′ long) from the tank supply adequate pressure to the two lines into the house (each 50′ long from tee to water heater), or do I need to start from the tank with a new 1″ line and reduce to 3/4″ at the tee?

    • #292087
      SylvanLMP
      Participant


      In reply to message posted by armdiver:
      I’m building a new house where an old one burned and will hook up to an existing well which has a 3/4″ metal supply line underground which I would like to tie into with PVC pipe. My question deals with splitting or teeing off from existing metal pipe with two supply lines going to 2 water heaters. Will the initial 3/4″ supply line (40′ long) from the tank supply adequate pressure to the two lines into the house (each 50′ long from tee to water heater), or do I need to start from the tank with a new 1″ line and reduce to 3/4″ at the tee?


      Depends on the available pressure.
      You maybe confused about pressure with volume.

      To properly size piping one does not look into the sky for inspiration BUT rather look down to find the actual demand in GPM (fixture unit) requirements

      Unfortunately I cannot answer your question on here as I have been only seeing posting on flat rate pricing and nothing to do with the technical aspects of plumbing design on the plumbviews so I never learned the techinical aspects of my business

      So until some real to goodness plumber comes along I guess we both will have to plod along BUT I am sure someone can tell you exactly how much to charge but not necessarily how to install.

      I am so sorry but I must have been absent that day when the 12 hour expert course was given out on sizing.

      Possibly some one other can explain how to not only size the bloody piping BUT tell you also about friction losses and velocity and other good things plumbers used to have to know. Good luck

    • #292088
      armdiver
      Participant

      Thanks for clearing up my confusion. I spliced into the existing 3/4″ supply line. If I end up not having enough pressure/volume for my needs I’ll change it later and go from the tank. It’s done. Thanks for the post. I’ll let you know how important the course information was you missed out on that day when I flush my toilet.

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