Jabsco Par-Max Freshwater Pump — 12V, 1.0 GPM, with Bypass Module (4263-035-123C)
Free returns on all eligible orders
You have 30 days to request a return. All sale items are final sale.
Jabsco Par-Max Freshwater Pump — 12V, 1.0 GPM
A compact, quiet 12V freshwater pressure pump for single-tap marine installations. The Jabsco Par-Max 4263-035-123C delivers 1.0 GPM on demand — the right output for a single galley tap or head sink where low power draw and quiet operation matter most. The integrated bypass module reduces pump cycling and smooths flow without a separate accumulator tank, and the co-molded diaphragm technology is built for long service life. Quick-connect ports make installation and routine servicing fast, and the vibration-dampening mounting feet keep noise to a minimum. Self-priming and run-dry safe for flexible installation in any marine environment.
Key Features
- 1.0 GPM flow rate at 12V DC — ideal for single-fixture galley or head installations
- Integrated bypass module — reduces pump cycling and provides smoother flow without a separate accumulator tank
- 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
- Single-fixture freshwater pressure systems (one galley tap or head sink)
- Powerboats, sailboats, and small cruisers with minimal freshwater demand
- 12V DC freshwater systems where quiet operation and low power draw are priorities
- Installations where quick-connect port serviceability is preferred
Parts Desk Insights
The 1.0 GPM Par-Max is the entry-level model in the Jabsco Par-Max lineup — best suited for boats with a single tap and minimal freshwater demand, or as a dedicated pump for a single fixture in a larger system. The integrated bypass module is a genuine advantage over basic pumps at this price point, reducing the short-cycling that wears pumps out prematurely. For more flow, step up to the Jabsco Par-Max 2 GPM or Jabsco Par-Max 3 GPM. For multi-outlet simultaneous supply, the Jabsco Par-Max 2X Multi-Outlet 2.3 GPM is purpose-built for that use case. If you need a replacement pressure switch for this pump, the Jabsco Par-Max Pressure Switch Kit (37121-0010) is the correct service part.
Part Number: 4263-035-123C | Voltage: 12V DC | Flow Rate: 1.0 GPM | Ports: Quick-Connect | Includes: Integrated Bypass Module
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.