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Always Free Shipping—No Minimum Order Contiguous U.S. orders only. Alaska and Hawaii excluded.
Returns & Refunds
Eligible items may be returned within 30 days of delivery. Items must be new, unused, uninstalled, and in original packaging. An RMA is required.
Installment options at checkout are provided by Shop Pay and its partners and are subject to eligibility. Options depend on your purchase amount and may require a credit check by the financing partner. Terms, rates, and eligibility are determined by the financing partner. For details, see the Shop Pay Installments terms during checkout.
HD (Heavy Duty) models include a wider diameter motor with a powder coated shell, cast aluminum endbells and lower housing to improve pressure capability and life. Available in configurations up to 6 GPM (23 LPM) and 60 PSI (4.1 BAR), these pumps deliver exceptional performance.
Standard models provide good performance in an economical footprint. These configurations are available in 1-3 GPM, perfect for vessels with 1-3 outlets. A plastic housing protects the motors on these units from corrosion.
Features:
Co-molded diaphragm technology for long life and durability
HD models feature heavy duty, motors and cast aluminum lower housings which allow for longlife, even at high pressures
Efficient and quiet operation
Integrated, sealed pressure switch for on-demand operation
Self-priming allows for installation versatility
Can run dry without damage
Quick connect ports for ease of installation, servicing, and maintenance
Vibration dampening mounting feet
Equipped with integrated bypass module to reduce cycling and provide smoother flow
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.
The Jabsco Par-Max 1 Water Pressure Pump delivers reliable on-demand water pressure for marine vessels and water systems with up to three outlets. Operating on 12 volts, this 1 GPM pump provides a practical solution for consistent water delivery in a compact, economical design. Part number 42630-3512-3C identifies this Jabsco pump for straightforward product selection and replacement.
Designed for convenient installation and dependable service, the pump features a co-molded diaphragm, sealed pressure switch, self-priming capability, and an integrated bypass module. These features support smooth operation, help reduce cycling, and provide installation flexibility. Quick-connect ports simplify installation, servicing, and maintenance, while vibration-dampening mounting feet help support a quieter operating setup. The pump can also run dry without damage, according to the manufacturer’s specifications.
The Jabsco Par-Max 1 uses a brushed, permanent magnet TENV motor and a glass fiber reinforced polypropylene pumphead upper housing. EPDM check valves and a co-molded TPV diaphragm support the pump’s fluid-handling design. With a maximum inlet pressure of 30 PSI and a fluid temperature range from 32°F to 140°F, it is suited for compatible marine water-pressure applications. Its dry self-priming capability is rated at a minimum of 7 feet, and the IPX6 ingress protection rating adds defined protection for the pump enclosure.
Key Features
12-Volt, 1 GPM Water Pressure Pump: Provides on-demand water delivery for marine vessels and systems with up to three outlets.
35 PSI Pressure Rating: Supports consistent water pressure for the intended pump application.
Self-Priming Design: Provides installation flexibility with dry self-priming capability rated at a minimum of 7 feet.
Integrated Pressure Switch and Bypass Module: Enables on-demand operation while helping reduce cycling and promote smoother flow.
Service-Friendly Construction: Quick-connect ports and vibration-dampening mounting feet support installation, maintenance, and operation.
Dry-Run Capability: The pump can run dry without damage, as specified by the manufacturer.
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.
Choose the Jabsco Par-Max 1 for a compact, serviceable 12-volt water pressure pump built for compatible marine water system applications.
SEO Meta Description
Jabsco Par-Max 1 12V water pressure pump delivers 1 GPM at 35 PSI with self-priming, quiet operation, quick-connect ports, and on-demand control.
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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 
