Jabsco Par-Max Freshwater Pump — 12V, 3.0 GPM, with Bypass Module & Strainer (3139-540-123A)
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You have 30 days to request a return. All sale items are final sale.
Jabsco Par-Max Freshwater Pump — 12V, 3.0 GPM
The highest-output model in the standard Jabsco Par-Max lineup. The Par-Max 3139-540-123A delivers 3.0 GPM at 12V — enough flow for two fixtures running simultaneously with strong, consistent pressure. The integrated bypass module reduces pump cycling and smooths flow without a separate accumulator tank, the co-molded diaphragm is built for long service life, and the Quick Connect Strainer is included to protect the pump from supply line debris. Quick-connect ports make installation and routine servicing fast, and vibration-dampening mounting feet keep operation quiet. Self-priming and run-dry safe for flexible installation in any marine environment.
Key Features
- 3.0 GPM flow rate at 12V DC — the highest output in the standard Par-Max lineup; handles two simultaneous fixtures
- Integrated bypass module — reduces pump cycling and provides smoother flow without a separate accumulator tank
- Quick Connect Strainer included — protects pump from supply line debris
- Co-molded diaphragm technology for long service life and durability
- Integrated, sealed pressure switch for automatic on-demand operation
- Quick-connect ports for fast installation, servicing, and maintenance
- Vibration-dampening mounting feet for quiet operation
- Self-priming — flexible installation without manual priming
- Run-dry capable — no damage if the tank runs empty
Compatible Applications
- Two-fixture freshwater pressure systems (galley + head running simultaneously)
- Powerboats, sailboats, and cruisers requiring the maximum output from the standard Par-Max series
- 12V DC freshwater systems where quiet operation and compact size are priorities
- Installations where quick-connect serviceability and an included strainer are preferred
Parts Desk Insights
The 3.0 GPM is the top of the standard Par-Max range — the right choice for boats with two fixtures that may run at the same time and where the compact Par-Max form factor is preferred over the heavier-duty HD series. If you only need one fixture, the Jabsco Par-Max 1 GPM or Jabsco Par-Max 2 GPM are the step-down options. For dedicated multi-outlet simultaneous supply, the Jabsco Par-Max 2X Multi-Outlet 2.3 GPM is purpose-built for that use case. For larger boats with three or more fixtures or higher-demand systems, the Par-Max Heavy Duty series is the step up: Par-Max HD 3 GPM, Par-Max HD 4 GPM, Par-Max HD 5 GPM, and Par-Max HD 6 GPM. Add a Jabsco Accumulator Tank or GROCO PST-1 downstream for even smoother pressure delivery.
Part Number: 3139-540-123A | Voltage: 12V DC | Flow Rate: 3.0 GPM | Ports: Quick-Connect | Includes: Bypass Module & Quick Connect Strainer
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 1-3 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.