Hardie UltraFlow 2" Valves Won't Close—Solenoid then Diaphragm

15-year-old Hardie UltraFlow 2" valves sometimes won't shut off. System under constant pressure.

Diagnosis (Spanish Response)

Most likely: solenoids not closing properly. Replace solenoids (shut water off first).

If persists: diaphragms failed. Hardie = Irritrol now. Check Irritrol for UltraFlow diaphragm kits.

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