Jabsco Par-Max HD4 Heavy Duty Water Pressure Pump - 24V - 4 GPM - 40 PSI

Jabsco Par-Max HD4 is a 24V, on-demand water pressure pump designed for marine, RV, and off-grid systems. It delivers steady 4 GPM at up to 40 PSI, with a compact footprint ideal for vessels with 1–3 outlets.

• Power and performance: 24V operation providing 4 GPM at 40 PSI on-demand water pressure.
• Heavy‑duty construction: Wider diameter motor with a powder-coated shell, cast aluminum endbells and lower housing to boost pressure capability and longevity.
• High-flow, scalable family: Part of a family offering configurations up to 6 GPM (23 LPM) and 60 PSI (4.1 BAR).
• Ideal for 1–3 outlets: Designed to deliver dependable performance in vessels with multiple outlets under demanding conditions.
• Co‑molded diaphragm technology: Enhances life and durability in tough operating environments.
• Corrosion‑resistant housing: Protects the motor in harsh marine and outdoor environments.
• Integrated, sealed pressure switch: On-demand operation without external components.
• Self‑priming with dry run tolerance: Flexible installation options and reliable priming; dry self-priming capability up to 7 ft (2.13 m).
• Quick‑connect ports: Simplify installation, servicing, and maintenance.
• Vibration‑dampening mounting feet: Reduces noise and movement during operation.
• Integrated bypass module: Reduces cycling and provides smoother flow for steadier pressure.
• Materials: Pumphead upper housing is glass fiber reinforced polypropylene; Diaphragm is co‑molded TPV; Check valves are EPDM.
• Max inlet pressure: 30 PSI (2.1 Bar).
• Fluid temperature range: 32°F–140°F (0°C–60°C).
• Dry self‑priming capability: 7 ft (2.13 m) minimum.
• Certifications & rating: CE, ISO8846, RCM; IPX6 ingress protection.
• Applications: Marine and RV water systems requiring reliable, smooth, on-demand pressure.
• Note: Prop65 warning applies for antimony oxide; for details visit P65Warnings.ca.gov.

By delivering on‑demand pressure without cycling, the HD4 helps you run showers, faucets, and galley appliances smoothly on vessels with 1–3 outlets. The self‑priming design and quick‑connect ports simplify installation, while the rugged housing and co‑molded diaphragm stand up to salt spray, vibration, and temperature swings. In short, it's a durable, low‑maintenance solution for steady water pressure in marine, RV, and off‑grid systems.