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AR503-SP Diaphragm Pump


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SKU: AR503-SP Categories: ,


AR503-SP – 550 RPM – Semi Hydraulic Three Diaphragm Pump

Call for Special Pricing – 561-964-3228!

This pump supersedes Hypro D503 pump. This ‘-SP’ version does not come with Gearbox or Control Unit. This is a bare pump which will need a Control Unit to operate.
140 degrees Fahrenheit – Max Water Temp | 35 mm – Suction | 1 inch – Outlet

SP – Single shaft with 3 or 6 threaded holes or, in other models cylindrical & key shaft


  • Alternating volumetric pumps with three semi-hydraulic diaphragms for use in the gardening or semi-professional agricultural sectors, trolley-mounted in combination with electric motors or internal combustion engines for gardening, and small sprayers for medium-pressure pesticide treatments in gardens, greenhouses, orchards or vineyards
  • Parts in contact with pumped liquids in Rilsan-coated or anodized aluminum, nylon and stainless steel
  • Diaphragms in NBR, Desmopan or Viton.


Max GPM 14.3
Max L/Min 54.1
Max PSI 580
MaxBar 40
Outlet 3/4 inch NPT
Max Temp 140 degrees Fahrenheit
HP 5.6
Weight 25.4
Suction 30 mm
Pressure Medium



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Prop 65 Warning!

This product can expose you to chemicals which are known to the State of California to cause cancer.