Jabsco ParMax HD4 Diaphragm Pump 1/2 Inch 24V
- Brand:
- Jabsco
- Part no:
- Q402J-112S-3A
Image: tfpumps.com
Where to buy
Specifications
- Flow
- 15 L/min
- Pressure
- 25 psi
- Voltage
- 24V
- Port size
- 1/2 inch
The Jabsco ParMax HD4 is a 24V diaphragm freshwater pump with a 4 chamber design, Santoprene diaphragms and EPDM check valves. It has 1/2 inch hose barb ports and is rated for 15 LPM. A pressure switch shuts it off at 25 PSI, and it can prime itself dry from 8 ft. A 40-mesh strainer and an internal bypass are built in, and vibration-damping feet are fitted under the pump.
Our take
The 25 PSI shut-off and 15 LPM flow rate set what this pump delivers at a tap, and the pressure switch means it only runs when the line drops. The built-in 40-mesh strainer and bypass keep the install simple. It is a 24V unit, so it needs a 24V supply.
From our buying guide
Size a freshwater pump by the outlets that must run at once. Jabsco's rule of thumb is 1 GPM per outlet, and the listed flow is open flow, which falls as pressure rises.
Check before you buy:
- The data sheet shows flow at pressure. One Shurflo gives 4.0 GPM at 0 psi and 2.0 GPM at 40 psi.
- You have an inlet strainer, which Jabsco says is required in every freshwater pump installation.
- An accumulator suits the pump. Jabsco says one cuts cycling on a pressure-switch system, and not to use its accumulators with variable-speed pumps.