Jabsco Par-Max HD4
#8 in 4 GPM and upFull review
A heavy-duty 4 GPM, 60 psi pump with a 3-year warranty at a fair price, for boats and RVs with two fixtures.
Amazon $165.60$165.60
The Jabsco Par-Max HD4 rates 3.2 among 4 GPM and up RV water pumps; the Jabsco Par-Max HD3 rates 2.5 among under 4 GPM ones.
Prices were last checked November 9, 2026. Product prices and availability are accurate as of that date and are subject to change; the price and availability shown on Amazon or the retailer's site at the time of purchase apply. As an Amazon Associate we earn from qualifying purchases.
Jabsco Par-Max HD3
#10 in Under 4 GPMFull review
A heavy-duty 3 GPM marine pump with a 3-year warranty. It costs more than lighter pumps with higher pressure.
Amazon $166.06$166.06
Scores side by side
These two sit in different flow classes (4 GPM and up and under 4 GPM), and each is scored against the reference points for its own class, so a rating says how well each does among its own flow peers. How we rank explains each factor.
| Factor weight | Jabsco Par-Max HD4 | Jabsco Par-Max HD3 |
|---|---|---|
| Overall rating | 3.2/5 | 2.5/5 |
| Value 25% | 34 $41.40 per GPM ($165.60, 4 GPM) | 15 $55.35 per GPM ($166.06, 3 GPM) |
| Flow 20% | 50 4 GPM rated open flow | 25 3 GPM rated open flow |
| Pressure 15% | 86 60 psi shut-off | 29 40 psi shut-off |
| Efficiency 10% | 28 0.35 GPM per amp (11.5 A max) | 36 0.38 GPM per amp (8 A max) |
| Features 15% | 35 runs dry without damage, thermal protection | 15 thermal protection |
| Warranty 15% | 67 3-year warranty | 67 3-year warranty |
Specifications
| Jabsco Par-Max HD4 | Jabsco Par-Max HD3 | |
|---|---|---|
| Performance | ||
| Rated open flow | 4 GPM | 3 GPM |
| Shut-off pressure | 60 psi | 40 psi |
| Max current draw | 11.5 A | 8 A |
| Price per GPM | $41.40 | $55.35 |
| Self-priming lift | 8 ft | 8 ft |
| Features | ||
| Control | Pressure switch | Pressure switch |
| Diaphragm chambers | 4 | 4 |
| Runs dry | Yes | - |
| Thermal protection | Yes | Yes |
| Build | ||
| Weight | 5.6 lb | 5.1 lb |
| Warranty | 3 years | 3 years |