Jabsco Par-Max 1 Freshwater Delivery Pump, 12V, 1 GPM, 35 PSI

Overview

The Jabsco 42630-3512-3C is a PAR-Max 1 freshwater delivery pump for a 12 VDC marine water pressure system with one outlet. It moves up to 1 GPM (3.8 LPM), uses an integrated pressure switch with a 35 PSI cut-off, and self-primes up to 6 ft (1.8 m).

This pump fits small freshwater setups where steady on-demand pressure is needed for a single tap or similar outlet. At about 6.5 in long, 4.0 in wide, and 2.7 in high, it is easier to place in compact lockers and service spaces than larger multi-outlet pumps.

It is a freshwater pressure pump rather than a washdown kit. The package does not include a strainer, trigger nozzle, or hose coil, so it is best matched to tank-fed potable or general freshwater circuits on boats that run on 12 VDC.

Key features

• 12 VDC pump for marine freshwater pressure systems, with operating range from 9 to 13.6 VDC
• 1 GPM (3.8 LPM) open flow with 35 PSI (2.4 bar) pressure switch cut-off for a single outlet circuit
• Self-primes up to 6 ft (1.8 m) and can run dry without damage
• Quick-connect ports with included 3/8 in (10 mm) straight hose barbs and 3/8 in ID to 1/2 in hose barb adapters
• 2 chamber diaphragm design with an enclosed permanent magnet TENV motor, thermal protection, and rubber feet that help reduce vibration and noise
• Wetted materials include fiber reinforced polypropylene, Santoprene, and EPDM, with stainless steel fasteners in the pump head
• IPX4 rated and ISO 8846 ignition protected for marine installation

Installation and setup

This model uses 6 in (152 mm) 18 AWG stripped wire leads and calls for a 4 amp fuse, which is not included. The quick-connect port layout helps when the pump needs to be removed for service, and the rubber mounting feet help keep noise down when it is installed near cabin spaces.

It is built for tank-fed systems, not for a pressurized inlet feed. The maximum inlet pressure is 0 PSI, and the rated fluid temperature range is 32 F to 110 F (0 C to 43 C), so it should be installed in a freshwater circuit that stays within that range.

Compatibility and fit

This pump is a good match for small 12 V boats that need pressure water at one outlet, such as a compact galley sink or a simple freshwater service point. It is less suited to boats with multiple faucets, showers, or higher water demand, since open flow is limited to 1 GPM and the motor is rated for intermittent duty.

Materials and corrosion resistance

The pump head uses fiber reinforced polypropylene for the upper and lower housings, with EPDM check valves and a Santoprene diaphragm in the wetted path. The motor sits inside a protective plastic casing, which helps in damp marine spaces where spray, salt air, and routine washdowns around nearby equipment are part of normal use.

What's included

• Pump unit
• 2 x 3/8 in (10 mm) straight hose barb fittings
• 2 x 3/8 in ID to 1/2 in hose barb adapters
• Instruction manual

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