The Hypro D503 diaphragm pump is a three diaphragm medium pressure pump that is designed to give you the best spraying performance for small to medium sized sprayers. Made of anodized aluminum, this pump can allow you to pump up to 14.3 gpm at 580 psi. The D503 can accommodate a variety of shaft sizes and gear reductions.

Hypro/Pentair is no longer distributing the 9910 series of diaphragm pumps, components, and related parts. Products with Hypro labeling will be unavailable soon.

Hypro medium pressure diaphragm pumps are recommended for spraying herbicides, pesticides, liquid fertilizers, and many other hard-to-handle fluids. Low-cost maintenance and almost wear-free operation make these pumps ideal for a wide variety of spraying jobs. Pressure and output are designed for optimum performance of small to medium-sized sprayers. Hypro medium pressure diaphragm pumps can be adapted for male 1-3/8" splined shaft, female 1-3/8" splined shaft, 1" solid shaft, or gear reduction drive options. Pumps include a pulsation dampener except for Models 9910-D303, D403, and D503s.

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• Max flow: 14.3 gpm
• Max pressure: 580 psi
• Max rpm: 550
• Port sizes: 1-1/4" HB inlet, 3/4" NPT outlet
• Pump shaft rotation: CW and CCW
• Diaphragms: 3, semi-hydraulic, Desmopan® standard Buna available
• Housing: Anodized aluminum
• Recommended pressure regulator: 9910-RM40
• Recommended gearbox: 9910-KIT1640 with 3/4" hollow shaft for mounting on 5 to 6.5 hp engines or 9910-KIT1642 with 1" hollow shaft for mounting on 8-11 hp gas engines
• Max fluid temperature: 140°F
• Weight: 28 lbs