Jabsco Par-Max HD4 Heavy Duty Water Pressure Pump - 12V - 4 GPM - 40 PSI

Meet the Jabsco Par-Max HD4 Heavy Duty Water Pressure Pump — a 12V, high-capacity solution engineered for reliable on-demand water pressure in demanding marine, RV, and off-grid applications. Delivering 4 GPM at up to 40 PSI, this pump combines rugged construction with smooth, quiet operation to keep your water system performing at its best.

Key benefits and features

• Heavy-duty design features a wider diameter motor with a powder-coated shell, cast aluminum endbells, and a robust lower housing to boost pressure capability and extend life.
• High-performance options HD models scale up to 6 GPM (23 LPM) and 60 PSI (4.1 BAR) for larger systems, while standard configurations deliver solid performance in an economical footprint.
• Co-molded diaphragm technology for long life and reliable operation under varying pressures.
• Integrated bypass module reduces cycling and provides smoother flow, enhancing overall quietness and efficiency.
• Self-priming and dry-run capable for versatile installation and protection against damage during dry operation.
• Quick connect ports for fast, easy installation, servicing, and maintenance, plus vibration-dampening mounting feet to reduce noise and movement.
• Integrated sealed pressure switch for on-demand operation, helping conserve energy and extend pump life.

Robust specifications

• Motor design: Brushed, permanent magnet TENV
• Pump head upper housing: Glass fiber reinforced polypropylene
• Diaphragm: Co-molded TPV
• Check valves: 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)
• Ingress Protection: IPX6
• Certifications: CE, ISO8846, RCM
• Warning notice: Prop65 compliant with related chemical disclosure
• Manufacturer: Jabsco | Part No: Q401J-115S-3A | UPC: 671880841863

Whether you’re outfitting a boat, RV, or remote water system, the Jabsco Par-Max HD4 delivers dependable performance, quiet operation, and easy maintenance in a compact, corrosion-resistant package. Choose the HD4 for durable pressure head and reliability, or select higher-flow configurations for larger demands—all backed by Jabsco’s reputation for quality and innovation.