Jabsco Par-Max 2.9 Water Pressure Pump 31395-0092
- Brand:
- Jabsco
- Part no:
- 31395-0092
Where to buy
Specifications
- Pressure
- 50 psi
- Port size
- 1/2 inch hose barb
This is the Jabsco Par-Max 2.9 water pressure pump, a diaphragm pump supplied as a pump and motor unit. A 12 volt DC motor drives it. Construction is polypropylene, the diaphragm is Santoprene and the check valves are EPDM. A pressure switch shuts the pump off at 50 psi, and the ports take 1/2 inch hose barbs. The Jabsco part number is 31395-0092.
Our take
The pressure switch that turns the pump off at 50 psi means it stops itself once the system is up to pressure instead of running on. Its ports are 1/2 inch hose barbs, so match your hose and fittings to that size when planning the plumbing.
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.
