Jabsco Sensor-Max II Variable Speed Freshwater Pump – 5 GPM, 115V | V50AJ115N3A
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You have 30 days to request a return. All sale items are final sale.
Jabsco Sensor-Max II Variable Speed Freshwater Pump – 5 GPM, 115V | V50AJ115N3A
The quietest, most responsive freshwater pump in the Jabsco lineup. The Sensor-Max II uses an advanced pressure sensor and variable speed motor to continuously match pump output to actual system demand — so pressure stays steady, the motor runs only as hard as it needs to, and you never hear the jarring on/off cycling of a conventional pump.
The five-chamber diaphragm design delivers high flow capacity with smooth, consistent pressure across up to five outlets simultaneously. No accumulator tank required.
Key Features
- Variable speed motor automatically adjusts to system demand
- Advanced pressure sensor for smooth, consistent water pressure
- Five-chamber diaphragm design — supplies up to 5 outlets
- Eliminates the need for a separate accumulator tank
- Quiet operation with no water hammer
- Conserves power by running only as fast as needed
- Robust co-molded diaphragm for long service life
- Cast aluminum lower housing for durability
- Flow rate: 5 GPM | Voltage: 115V AC
Compatible Applications
- Marine freshwater pressure systems
- Boats with multiple cabin outlets (up to 5 simultaneous)
- Installations where quiet operation is a priority
- Systems where an accumulator tank is not practical or desired
- RV and off-grid freshwater systems
Parts Desk Insights
Best use case: The Sensor-Max II is the right pump when you want a premium, set-and-forget freshwater system. It's particularly well suited to larger boats with multiple outlets where pressure consistency matters — showers, galley, and head all running without pressure drops. The variable speed design means it's noticeably quieter than standard on/off pumps, which makes a real difference in a live-aboard or overnight cruising context. If you need a simpler, lower-cost option for a smaller system, the Jabsco Par-Max 3 GPM or Par-Max Heavy Duty are solid alternatives. If you do want an accumulator tank for added pressure buffering, see the Jabsco 33 oz Accumulator Tank.
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.