EasyPro Stratus ERP Series Rocking Piston Compressors
EasyPro Stratus ERP Series Rocking Piston Compressors
1/4hp Compressor1/2hp Compressor3/4hp Compressor
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The Stratus ERP Series rocking piston air compressors are designed specifically for the demanding job of 24/7 operation, making them ideal for pond aeration systems. The oil-less design safely aerates ponds with no electricity in the water. 
  • Lightweight die-cast aluminum components and hard-coated cylinder for wear resistance
  • Permanently lubricated bearings and easily replaceable piston seal
  • Included inlet air filter, rubber foot pads and 6' power cord
  • 2 year warranty
Part # Power Volts Amps* Daily Cost** Ship Weight
ERP25 1/4hp 115v 1.8 $0.37 16lb
ERP252 230v 0.9
ERP50 1/2hp 115v 4.0 $1.00 19lb
ERP502 230v 2.0
ERP75 3/4hp 115v 5.7 $1.38 26lb
ERP752 230v 2.9
*Amps measured at 10' operating depth
** Cost figured at $0.09 per kWh, 10' operating depth, 24/7 operation


Part # Air Flow, in cfm, at Given Water Depth
0' 10' 20' 30' 40' 50'
ERP25/ERP252 2.5 2.1 2.0 1.9 1.8 1.6
ERP50/ERP502 5.2 4.7 4.5 4.3 4.1 3.8
ERP75/ERP752 7.5 7.1 6.8 6.6 6.4 6.1

See Also