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Airmax SilentAir RP50 (87R) 1/2 HP Rocking Piston Compressor is a replacement motor for the Airmax SW40HP and PS20, PS30 and LS40 Aeration Systems. This highly efficient compressor produces up to 4.7 CFMs at 4.1 running amps, while costing just $23.76 a month. Design features SmartStart Technology that protects the compressor during pressurized restarts following power supply interruptions. Available in 115 or 230 volts.

Note this is the replacement pump only and does not include the air filter, pressure relief valve, or other additional components.

*Monthly Operating Cost was calculated at $0.07 per kilowatt hour. Please note that costs will vary depending on location.

Compressor 1/2 HP Dual Piston
Model 87R
Voltage 120V or 230V
Max Diffuser Depth 50 Feet
Max CFM 4.7
Running Amps 4.1 or 2.1
Monthly Operating Cost (24/7) $23.76
Replacement Unit For SW40HP, PS20, PS30, LS40
Warranty 1 Year
Airmax Silent Air G50 (RP50(87R) 1/2 HP Aeration Pump

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