Pentair Sta-Rite Damaged or Missing Drain Plug O‑Rings

Pump leaks at the drain plugs on the bottom of the housing

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Possible Causes

O‑rings lost during winterization, Cracked from age or chemicals, Drain plugs cross‑threaded

How to Fix / Troubleshooting

Safety: Turn off power and close valves to prevent water flow while servicing.

  • Remove drain plugs: Unscrew the Sta‑Rite pump drain plugs and inspect the threads and o‑rings.
  • Replace o‑rings: Install new OEM o‑rings on the drain plugs. Do not use tape in place of o‑rings.
  • Inspect threads: Check the pump housing threads for cracks. If cracked, the housing may need replacement.
  • Reinstall carefully: Hand‑tighten the drain plugs; do not overtighten, which can crack the housing.
  • Check for leaks: Restore flow and observe the plugs for drips.
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Repair Difficulty

Very Easy 1/5

Required Part

Pump Drain Plug O‑Rings
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