Pool and Spa Air Blowers

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A blower pushes air, not water, and that is the whole point of it. It feeds the ring of small holes round a spa bench or the bubbler in a pool so the water fizzes, and it does nothing at all for circulation or filtration. It is a separate machine from the pump, on its own switch, and the ones here run 1 to 2 HP on 120V or 240V. If the bubbles have stopped and the water is still moving, the blower is what has failed.

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About Pool and Spa Air Blowers

Regenerative air blowers from Air Supply of the Future, Zodiac, SuperPro and Fuji, in 1, 1.5 and 2 HP, on 120V, 240V and dual voltage, with airflow published on the models that state it.

Spa jets and the fittings the air arrives through are in spa parts, and the pump that moves the water is in spa pumps.

Questions about Pool and Spa Air Blowers

What does a blower actually do?

It injects air into the water so the jets froth. On a spa that is most of the sensation people are paying for: the pump supplies pressure and volume, and the blower supplies the bubbles. Some pools use one for a bubbler seat or a spillway feature. What it never does is help circulate or filter, so a failed blower makes a spa feel flat while the water stays perfectly clean, which is exactly why people misdiagnose it as a pump problem.

Blower or pump, which one has failed?

Listen, then look at the water. If the jets still push water hard but the froth has gone, the pump is fine and the blower is the suspect. If the jets have gone weak or stopped entirely, that is the pump or something blocking it, and the blower is irrelevant. A blower that has died usually goes silent, while one that is struggling gets noticeably louder and hotter before it goes, because these are high speed motors with very little between them and the air they move.

What size do I need?

Match what came off, because the number of jets it has to feed is what sets it. Blowers here are 1, 1.5 and 2 HP, and the bigger ones are for a spa with a lot of air holes or a long run of pipe to push down. Going larger than the original does not make a spa nicer; past the point the jets can pass it, the extra air has nowhere to go and you get noise instead of bubbles. Check the voltage as well, since both 120V and 240V units are on this shelf and they are not interchangeable.

Why is my blower so loud?

Partly by nature and partly by mounting. A regenerative blower spins fast and moves a lot of air through a small housing, so it is never silent, and on a hard surface in an enclosed equipment space the noise reflects and doubles. A blower that has become much louder than it used to be is usually telling you its bearings are going, and that is a warning worth acting on rather than living with, because the next stage is a seized motor.