Jabsco Par-Max HD4 Heavy Duty Water Pressure Pump - 12V - 4 GPM - 40 PSI [Q401J-115S-3A]

The Jabsco Par-Max HD4 heavy-duty water pressure pump delivers 4 GPM at a listed maximum pressure of 40 PSI and operates on 12V power. Its sealed pressure switch provides on-demand operation, while an integrated bypass module reduces cycling for smoother flow.

The HD design uses a wider-diameter motor with a powder-coated shell, cast aluminum endbells, and a cast aluminum lower housing to support pressure capability and service life.

Features

• Co-molded diaphragm technology for durability and long service life.
• Heavy-duty motor and cast aluminum lower housing for operation at high pressures.
• Efficient, quiet operation with vibration-dampening mounting feet.
• Integrated, sealed pressure switch for on-demand operation.
• Self-priming design provides installation flexibility.
• Can run dry without damage.
• Quick-connect ports simplify installation, servicing, and maintenance.
• Integrated bypass module reduces cycling and smooths flow.

Specifications

• Part number: Q401J-115S-3A
• Voltage: 12V
• Flow rate: 4 GPM
• Maximum pressure: 40 PSI
• Motor design: Brushed, permanent magnet TENV
• Pumphead upper housing: Glass-fiber-reinforced polypropylene
• Diaphragm: Co-molded TPV
• Check valves: EPDM
• Maximum inlet pressure: 30 PSI (2.1 bar)
• Fluid temperature range: 32–140°F (0–60°C)
• Dry self-priming capability: Listed as "7ft min (2.13m/min)." The supplied metric notation is unclear; confirm the priming specification before planning installation.
• Certifications: CE, ISO8846, RCM
• Ingress protection: IPX6
• Packaged dimensions: 5 inches H × 6 inches W × 15 inches L
• Packaged weight: 7.85 lb
• UPC: 671880841863

Range information

The wider HD pump range includes configurations up to 6 GPM (23 LPM) and 60 PSI (4.1 bar); those are range maximums, not the ratings of this 4 GPM, 40 PSI model. Separate standard models offer 1–3 GPM for vessels with 1–3 outlets, with a compact, economical footprint and plastic motor housing for corrosion protection.

Brochure (PDF)

WARNING: This product can expose you to chemicals including ANTIMONY OXIDE (ANTIMONY TRIOXIDE) which is known to the State of California to cause cancer. For more information go to P65Warnings.ca.gov.