Dream Maker Spas
Water hammer or loose plumbing
Spa makes loud banging or knocking noises when pump starts or stops
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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 plumbing supports, Air pockets in lines, Check valves slamming shut, Pump mounting bolts loose
How to Fix / Troubleshooting
Safety first: Turn off power before tightening any hardware or working near moving parts.
Reduce noise:
- Bleed air: Purge air from pump and plumbing by loosening unions and running the pump on low speed.
- Secure plumbing: Inspect PVC pipes and manifolds around the pump and heater. Add clamps or supports where pipes move excessively.
- Tighten pump mounts: Ensure the pump is firmly bolted to the equipment base and that rubber mounts are intact.
- Inspect check valves: If present, check valves may be slamming shut. Replace worn valves with spa-rated, soft-closing types.
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Repair Difficulty
Medium
3/5
Required Part
Pump Mounting Hardware
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