SEAFLO 51 Series
Score: 88/100
Jabsco Par-Max HD5
Score: 88/100Rankings
The SeaFlo 51 Series is a heavy-duty, 5-chamber positive displacement diaphragm pump designed for automatic demand water systems in RVs, boats, and off-grid setups. It delivers high flow rates up to 5.5 GPM at 60 PSI with self-priming capabilities and run-dry safety, making it suitable for supplying multiple fixtures simultaneously. While it offers excellent performance and durability, the high amp draw requires careful electrical planning.
The Jabsco Par-Max HD5 is a heavy-duty 12V DC water pressure pump designed for marine and RV freshwater systems, delivering up to 5 GPM at 60 PSI. It features a robust construction with a cast aluminum lower housing, powder-coated motor shell, and co-molded TPV diaphragm to ensure longevity under high-pressure conditions. Best suited for marine vessels or RVs with 3+ outlets needing high flow/pressure, such as multiple showers and galleys.
| Attribute | | |
|---|---|---|
5.5 GPMbest | 5 GPM | |
60 PSIbest | 60 PSIbest | |
6 ft | 8 ftbest | |
24 Vbest | 12 V | |
0.12 HPbest | — | |
9 Abest | — | |
100 %best | — | |
140 °Fbest | 140 °Fbest |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | | |
|---|---|---|
Performance & Power(2) | ||
Flow Rate (GPM) | 5.5 GPM | 5 GPM |
Voltage (V) | 24 V | 12 V |
Features & Protection(2) | ||
IP Rating | N/A | IPX6 |
Warranty Length (months) | 48 months | null months |
Build & Durability(3) | ||
Motor Type | Diaphragm | Brushed Permanent Magnet TENV |
Weight (lbs) | 5.5 lbs | 8.4 lbs |
Diaphragm Material | Santoprene | TPV |
Installation & Compatibility(1) | ||
Self-Priming Lift (ft) | 6 ft | 8 ft |
Products in the top-left offer the best value (high score, low price).
Professional reviewers and editors praise the SeaFlo 51 Series for its high-volume flow, quiet efficiency, and durability in marine and RV applications. They highlight the smart pressure switch for consistent pressure and the 4-year warranty as standout features, describing it as a high-performance, durable solution for boats and RVs.
Everyday users commonly praise the strong pressure and flow performance, noting its suitability for RVs, pressure washing, and boats. While recurring complaints are minimal, some users note the high amp draw requires robust wiring, and a few mention that setup tweaks are needed for optimal quietness.
Retail descriptions from marine specialists emphasize the pump's exceptional performance for vessels with multiple outlets. They highlight the HD upgrades for providing long life even at high pressures and position it as a premium option over standard Par-Max models for demanding applications requiring up to 6 GPM/60 PSI in series.
Search results lack detailed expert reviews or user feedback, limiting analysis to product claims and listings. Listings show star ratings placeholders but no comments on praise or complaints regarding reliability, noise, or priming.
“performs well”
