Richdel 3/4" Valves: Manual Bleed Test for Pressure Loss

20-Year-Old Richdel Valves: Sudden Pressure Loss—Bleed Test

3/4" Richdel valves. Worked 2 days ago. Now water at heads but not enough to rotate. Valves or something else?

Manual Bleed Test

1. Find thumbscrew on valve top.
2. Slowly open until water runs out.
3. Valve should open fully.

Interpretation

• Pressure improves → Solenoid plunger swollen. Replace solenoid or plunger.
• No change → Check for leaks, tree roots, shutoff valves not fully open.

Richdel 2400 valves: plunger swelling is common at this age.