Drip Irrigation Pressure Reducers Test at 60 PSI – Switch to 30 PSI?

Two 400‑ft drip lines (44 and 73 emitters at 2 GPH). After a repair, the 73‑emitter line delivers only 0.5 GPH. Senninger 20 PSI regulators read 60 PSI out when tested on house supply.

Answers

1. Regulators need flow to regulate; static test shows inlet pressure. Test at end of drip line under flow.
2. Yes, switch to 30 PSI regulators – longer runs and more emitters need higher pressure.
3. Also check valve solenoid/diaphragm; even if valve clicks, a worn diaphragm can restrict flow.