USSPA Internal Plumbing or Component Leak

Spa is leaking water inside the equipment bay; puddles form under the spa.

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Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

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Possible Causes

Loose pump union on USSPA jet or circulation pump, Cracked heater union or gasket, Split PVC plumbing line, Leaking slice valve or check valve

How to Fix / Troubleshooting

Safety first: Turn OFF power at the breaker. Do not run pumps with low water level or active leaks.

  • Locate the leak source:
    • Remove side panels to access the equipment bay.
    • Use a flashlight to inspect around pumps, heater, and unions while the spa is filled.
  • Tighten unions:
    • Hand-tighten pump and heater unions; do not use excessive force.
    • If leaking persists, drain below the union and inspect/replace the O-ring.
  • Inspect valves and fittings:
    • Check slice valves for leaks around stems and bodies.
    • Replace leaking valves or seals as needed.
  • Repair cracked plumbing:
    • For small cracks, cut out the damaged section and glue in new PVC pipe and couplings using spa-rated PVC cement.
  • Refill and test:
    • Refill spa, restore power, and monitor for leaks over several hours.
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Repair Difficulty

Medium 3/5

Required Part

Pump Union O-Ring
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