Jabsco Par-Max HD Heavy-Duty Freshwater Pump — 12V, 3.0 GPM, Cast Aluminum Housing (Q301J-115-S3A)
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Jabsco Par-Max HD Heavy-Duty Freshwater Pump — 12V, 3.0 GPM
The entry-level model in the Jabsco Par-Max HD Heavy Duty series — and the right choice when you need the durability of the HD platform at 3.0 GPM. The Par-Max HD Q301J-115-S3A delivers 3.0 GPM at 12V with a heavy-duty motor and cast aluminum lower housing, built to handle higher pressures and more demanding duty cycles than the standard Par-Max series. The co-molded diaphragm, integrated bypass module, and sealed pressure switch deliver smooth, on-demand operation, and the Quick Connect Strainer is included. Self-priming, run-dry safe, and quiet thanks to vibration-dampening mounting feet.
Key Features
- 3.0 GPM flow rate at 12V DC — entry-level output in the Par-Max HD series
- Heavy-duty motor and cast aluminum lower housing — built for long life at high pressures and demanding duty cycles
- Integrated bypass module — reduces pump cycling and provides smoother flow
- 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 systems requiring the durability of the HD platform over the standard Par-Max
- High-pressure freshwater systems where the standard Par-Max 3 GPM is insufficient
- Powerboats, sailboats, and cruisers with demanding duty cycles
- 12V DC installations requiring cast aluminum construction for long-term reliability
Parts Desk Insights
Choose the Par-Max HD 3 GPM over the standard Jabsco Par-Max 3 GPM when your system runs at higher pressures, sees more continuous use, or operates in conditions where the lighter-duty standard series would wear out prematurely. The cast aluminum lower housing is the key upgrade — it handles heat and pressure significantly better than the standard model’s housing. For more flow within the HD series, step up to the Par-Max HD 4 GPM, Par-Max HD 5 GPM, or Par-Max HD 6 GPM. Add a Jabsco Accumulator Tank or GROCO PST-1 downstream to smooth pressure delivery and reduce pump cycling.
Part Number: Q301J-115-S3A | Voltage: 12V DC | Flow Rate: 3.0 GPM | Housing: Cast Aluminum | 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.