The Hypro D503GRGI diaphragm pump is a medium-pressure diaphragm pump intended for landscaping and agricultural applications, as well as tree spraying at a medium height of up to about 60'. These Hypro D503 pumps can also be used as a hydrostatic test pump that tests pressure on pipes and sewers. This D503GRGI3/4 version of the D503 is ready to mount onto gasoline engines with a 3/4" shaft and is assembled with gearbox 9910-KIT1642 and control 9910-RM40 for mounting onto gasoline engines. It's recommended to use 8 HP or greater with this pump that has a 1" shaft. This D503GRGI diaphragm pump features an anodized aluminum housing, a flanged adapter shaft and a clockwise and counterclockwise pump shaft rotation. Note: If your Hypro D503 has mixed oil, you will need to purchase a repair kit because the oil has turned milky grey in color and you do not have the same ability to pump).

3 semi-hydraulic diaphragms

Max. 15 GPM ; Max. pressure: 580 psi ; Max. rated speed: 3600 RPM

Includes mounting base

Port sizes: 1 1/4" inlet; 3/4" outlet

Self-priming operation