Pool pump noise enclosure: what works and what doesn't
Updated : · Piscines VP
A well-built enclosure reduces airborne noise (the motor's sound), but not the vibration travelling through the ground: you also need to isolate the pump from its base. The enclosure must be ventilated, not touch the pump, be lined with absorbing material and stay easy to open for maintenance.
Building a box around the pump is tempting. It helps, if you do it right.
Two kinds of noise
- Airborne noise: the sound of the motor and fan. An enclosure reduces it.
- Vibration in surfaces: it travels through the slab, pipes and everything touching the pump. An enclosure doesn’t stop it. See Vibrating pump.
Rules for a good enclosure
- Ventilated: fresh air in low, warm air out high, far apart.
- Doesn’t touch the pump or pipes.
- Lined inside with a sound-absorbing, moisture-resistant material.
- Easy to open: you need access to the strainer and valves.
- Openings facing away from windows and neighbours.
- Drained: water from a leak shouldn’t pool.
Common mistakes
- Closed box with no ventilation: the motor overheats. See Overheating pump.
- Enclosure screwed to the same deck as the pump: it vibrates along and becomes a loudspeaker.
- Forgetting the base: vibration keeps passing through the ground.
The winning combo
Isolating the pump from its base handles vibration. The enclosure handles airborne sound. Together, it’s ideal.
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Frequently asked questions
Can an enclosure overheat the pump?
Yes, if it isn't ventilated enough. The motor needs fresh air. Plan air inlets and outlets, and leave space around the motor.
Why do I still hear a hum with the enclosure?
Because vibration passes through the slab, the pipes or the enclosure itself if it touches the pump. Isolate the pump from its base and make sure the enclosure doesn't touch it.
Not sure of the cause? Take the 2-question diagnosis →
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