Noisy hot tub pump: causes and fixes
Updated : · Piscines VP
A hot tub often has two pumps: a small circulation pump that runs for long hours and a jet pump. A continuous hum often comes from vibration passing into the cabinet, the tub's floor or the deck. A squeal means worn bearings, a gravel sound means lack of water. Check the water level, filters and pump mounts, and have any mechanical noise checked.
A hot tub is meant for relaxing. A continuous hum ruins it.
Two pumps, two noises
- Circulation pump: small, runs long hours. A continuous hum often comes from it.
- Jet pump: more powerful, louder when the jets are on.
Common causes
| Sound | Likely cause |
|---|---|
| Hum that makes the deck vibrate | Vibration passing through the cabinet or tub floor |
| High-pitched squeal | Worn pump bearings |
| Gravel, crackling | Lack of water: low level, dirty filters |
| Rattling | Debris in the pump or loose mount |
What to check
- Water level and clean filters.
- Pump mounts tight and in good shape.
- Cabinet panels firmly attached: a loose panel vibrates.
- The tub is level on a solid base.
- Any mechanical noise (squeal, scraping): call for service.
For a pool pump, see Noisy pool pump.
Frequently asked questions
Does SOURDINE work for hot tubs?
SOURDINE is designed for pool pumps. Hot tub pumps sit inside the tub's cabinet and are installed according to the manufacturer's instructions.
Why is my hot tub louder at night?
It isn't louder: the rest of the neighbourhood is quieter. The circulation pump running at night becomes audible.
Not sure of the cause? Take the 2-question diagnosis →
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