PDC Spas Plumbing or component leak in equipment area

Water is leaking from the equipment bay 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 heater union on PDC Spas heater tube, Cracked pump housing or volute, Failed pump shaft seal, Split PVC plumbing fitting or manifold

How to Fix / Troubleshooting

Safety first: Turn off power at the GFCI breaker before working around water and electrical components.

  • 1. Locate the leak: Remove the equipment panel and use a flashlight to trace the source of water while the spa is circulating. Look at heater unions, pump unions, and PVC joints.
  • 2. Tighten unions: If water drips from a heater or pump union, gently tighten the union nut by hand, then an additional small turn with a strap wrench. Do not overtighten.
  • 3. Replace O-rings: If tightening does not stop the leak, shut power OFF, drain water below the leaking union, and replace the union O-ring with a compatible PDC Spas heater or pump union O-ring.
  • 4. Cracked components: If the pump housing or heater tube is cracked, the entire component should be replaced.

Hidden leaks in foam-insulated plumbing away from the equipment bay are more complex and usually require a spa technician to locate and repair.

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Repair Difficulty

Medium 3/5

Required Part

PDC Spas heater union O-ring
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