New plumbing pressure test

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    • #274363
      MasterPlumbers
      Keymaster

      I have a home under construction and when the plumber filled the lines to about 40 lbs, the air then leaked out over the next 6 – 7 days. This to me, indicates a leak. A friend of mine said that some leakeage is normal and acceptable by code. Should I be concerned?

    • #289626
      fourth year
      Participant

      Which lines? Waste, water, or gas?

    • #289627
      fourth year
      Participant

      40 psi would be too much for sewer, too little for water, and either too much or too little for gas depending on which line it is.

    • #289628
      SylvanLMP
      Participant

      Hey Norm, most authorties frown upon an “air test” unless it is for gas lines.

      For vent and soil and waste a hydrostatic test of 5 PSI or a 10 ft head is suggested

      For water lines a hydrostsatic test pressure if off a city main then the city pressure is used to test the main coming in.

      In side the house we normally give a test of 50% GREATER then the normal expected design pressure.

      An air test can cause a pipe to litterly explode Tell the powers that be GET a copy of the ASME section IV code for Petes sake

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