Jabsco Par-Max HD6
#4 in 4 GPM and upFull review
The highest-flow pump here, 6 GPM at 60 psi, for big boats and multi-bath motorhomes that can feed its 18 A draw.
Amazon $266.47$266.47
6 GPM60 psi18 A
3.4/5
A heavy-duty 5 GPM, 60 psi pump for larger boats and motorhomes. Seaflo’s 55 Series gives more flow for half the price.
- 5 GPMFlow
- 60 psiShut-off
- 13 AMax draw
- Pressure switchControl
Check price at Amazon$228.83
Price checked November 9, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- 5 GPM at 60 psi feeds several fixtures at once
- Cast aluminum motor housing built for continuous high pressure
- 3-year warranty
Cons
- Draws up to 13 A, so it needs heavy wire
- Costs about $46 per GPM
The Jabsco Par-Max HD family
Every Jabsco Par-Max HD model we rank, smallest first. Ratings compare each against its own flow.
| Model | Flow | Rating | Price |
|---|---|---|---|
| Jabsco Par-Max HD3 | 3 GPM | 2.5/5 | $166.06 |
| Jabsco Par-Max HD4 | 4 GPM | 3.2/5 | $165.60 |
| Jabsco Par-Max HD5 (this one) | 5 GPM | 3.4/5 | $228.83 |
| Jabsco Par-Max HD6 | 6 GPM | 3.4/5 | $266.47 |
How it scores
The rating comes from 6 measured or published factors, each scored 0-100 against fixed reference points for its flow. How we rank explains each one.
Specifications
| Model number | P501J-118S-3A |
|---|---|
| Performance | |
| Rated open flow | 5 GPM |
| Shut-off pressure | 60 psi |
| Max current draw | 13 A |
| Price per GPM | $45.77 |
| Self-priming lift | 8 ft |
| Features | |
| Control | Pressure switch |
| Diaphragm chambers | 5 |
| Runs dry | Yes |
| Thermal protection | Yes |
| Build | |
| Weight | 6.5 lb |
| Warranty | 3 years |
Alternatives in this flow
Remco Aquajet RV Variable Speed
#5 in 4 GPM and upFull review
A variable-speed, high-pressure pump for motorhomes with filtration or long runs. The Seaflo 56A does the same job for less.
Amazon $226.10$226.10
5 GPM75 psi
Wassermann 3WDP4 4.0 GPM 45 psi
#7 in 4 GPM and upFull review
A low-cost 4 GPM pump for a trailer owner who wants more flow than the stock pump. Its sibling 5 GPM model costs only a few dollars more.
Amazon $59.99$59.99
4 GPM45 psi
Compare
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