Kamair Air Pumps

Use the duty point method: total the air your diffusers need, work out the pressure they need it at, then pick the model whose air flow at that pressure meets the demand with a little in reserve.

Allow about 10 kPa (100 mbar) for each metre of water above the diffuser, then add pipework friction and diffuser back pressure, which together commonly add another 5 to 15 kPa.

A diaphragm pump delivers less air as back pressure rises, so quoting all seven models at the same 1 m depth lets you compare them directly and size against your own depth.

All Kamair models run on standard single-phase mains, so no three-phase supply or switchboard work is needed; for larger duties a three-phase side channel blower is the better choice.

Yes – an inlet air filter keeps dust off the diaphragms and a pressure relief valve protects the pump if a line blocks or a valve is closed, and both are available from Fresh By Design.

Kamair pumps are a low-noise design, but they still shed heat through the aluminium housing, so mount them clear of the water in a ventilated, shaded spot rather than in a sealed box.

Keep the inlet filter clean and replace the diaphragm kit at the interval in the manual; access is straightforward and the work can be done on site.