
Jabsco ParMax
Score: 72/100
Seaflo 43-Series
Score: 88/100Rankings

The Seaflo 43 Series is a compact, self-priming 12V DC diaphragm pump designed for marine, RV, and off-grid water systems, delivering up to 3.0 GPM at 55 PSI. It features internal bypass technology and Variable Flow Technology to minimize cycling and noise while eliminating the need for an external accumulator tank. It is ideal for medium-duty, battery-powered water systems in RVs and boats requiring consistent pressure for multiple outlets.

The Jabsco PAR-Max 1.9 is a compact, low-noise freshwater pressure pump designed for marine and RV on-demand water systems. Its main trade-off is the intermittent duty cycle and lower pressure output, which limits its use to basic fixtures. It is best suited for boats with up to three water fixtures where quiet operation and battery efficiency are priorities.
| Attribute | ![]() | ![]() |
|---|---|---|
1.9 GPM | 3 GPMbest | |
25 PSI | 55 PSIbest | |
6 ftbest | 6 ftbest | |
12 Vbest | 12 Vbest | |
6 A | 6.86 Abest | |
104 °F | 140 °Fbest | |
| ↓ lower better | 2 lbsbest | — |
0.5 in | 0.75 inbest |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | ![]() | ![]() |
|---|---|---|
Performance & Power(4) | ||
Flow Rate (GPM) | 1.9 GPM | 3.0 GPM |
Max Pressure (PSI) | 25 PSI | 55 PSI |
Max Amperage (A) | 6 A | 6.86 A |
Duty Cycle (%) | intermittent % | Continuous % |
Build & Durability(2) | ||
Motor Type | Permanent Magnet | Diaphragm |
Diaphragm Material | Unknown | Santoprene |
Installation & Compatibility(2) | ||
Max Liquid Temperature (°F) | 104 °F | 140 °F |
Port Size (in) | 0.5 in | 0.75 in |



Professional assessment is limited due to a lack of detailed editor commentary, though certifications indicate marine-industry recognition.
No customer reviews or user feedback data are currently available for this specific model. Therefore, specific praise, complaints, or recurring themes from everyday users cannot be documented.

Professional reviewers and editors praise the Seaflo 43 Series as an exceptional value for low-flow marine and RV applications, highlighting its innovative internal bypass technology for reducing noise and cycling.
Everyday users and reviewers express high satisfaction with the pump's ease of installation and powerful flow rate. Common praise includes the ability to handle RV and camper demands effectively, with users noting the quiet, no-cycling operation in off-grid setups.
“best budget 12V water pump”

“great pumping power”
