Loosing Pressure

Discussion in 'Irrigation / Sprinkler Forum' started by johnjh2o1, Apr 27, 2011.

  1. johnjh2o1

    johnjh2o1 Plumbing Contractor for 49 years

    Aug 9, 2009
    What would cause a two zone index valve system to loose pressure in one Zone? I don't believe there is a leak in the zone because if I open the hose bib between the pump and the index valve the zone doesn't loose pressure. Also if I remove the disk in the index valve so both zones run at the same time the pump doesn't loose pressure. Could it be a leak in the suction line?

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