Jabsco Par-Max 3 25 psi
#8 in Under 4 GPMFull review
A low-pressure pump for boats and gravity-style systems where gentle 25 psi flow is wanted. Most RVs want a 45 to 55 psi pump instead.
Amazon $121.48$121.48
The Jabsco Par-Max 3 25 psi is the better RV water pump overall, rated 2.7 to 2.5. The Jabsco Par-Max 3 25 psi leads on efficiency and value. The Jabsco Par-Max HD3 wins on pressure and features. The Jabsco Par-Max 3 25 psi costs $44.58 less ($121.48 vs $166.06).
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
Which should you buy?
- Choose the Jabsco Par-Max 3 25 psi for efficiency (0.58 GPM per amp (5.2 A max) vs 0.38 GPM per amp (8 A max)) and value ($40.49 per GPM ($121.48, 3 GPM) vs $55.35 per GPM ($166.06, 3 GPM)).
- Choose the Jabsco Par-Max HD3 for pressure (40 psi shut-off vs 25 psi shut-off) and features (thermal protection vs none of the listed features).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every under 4 GPM RV water pump; a clear win is highlighted. How we rank explains each one.
| Factor weight | Jabsco Par-Max 3 25 psi | Jabsco Par-Max HD3 |
|---|---|---|
| Overall rating | 2.7/5 | 2.5/5 |
| Value 25% | 36 $40.49 per GPM ($121.48, 3 GPM) | 15 $55.35 per GPM ($166.06, 3 GPM) |
| Flow 20% | 25 3 GPM rated open flow | 25 3 GPM rated open flow |
| Pressure 15% | 0 25 psi shut-off | 29 40 psi shut-off |
| Efficiency 10% | 93 0.58 GPM per amp (5.2 A max) | 36 0.38 GPM per amp (8 A max) |
| Features 15% | 0 none of the listed features | 15 thermal protection |
| Warranty 15% | 67 3-year warranty | 67 3-year warranty |
Specifications
| Jabsco Par-Max 3 25 psi | Jabsco Par-Max HD3 | |
|---|---|---|
| Performance | ||
| Rated open flow | 3 GPM | 3 GPM |
| Shut-off pressure | 25 psi | 40 psi |
| Max current draw | 5.2 A | 8 A |
| Price per GPM | $40.49 | $55.35 |
| Self-priming lift | 10 ft | 8 ft |
| Features | ||
| Control | Pressure switch | Pressure switch |
| Diaphragm chambers | 3 | 4 |
| Thermal protection | - | Yes |
| Build | ||
| Weight | 3.2 lb | 5.1 lb |
| Warranty | 3 years | 3 years |