Jabsco 52530-1100 Double Stack Pump with Accumulator Tank 24V
The Jabsco 52530-1100 Double Stack is a complete, ready-to-run fresh water pressure system built for places where one pump just isn't enough. It pairs two Par-Max 4 diaphragm pumps with a 2-liter accumulator tank on one compact base. When a single tap is open, one pump handles the job at about 4.8 GPM. When the shower, galley sink, and deck wash all run at once, the second pump kicks in and delivers up to 9 GPM. You get steady pressure at every outlet without the pump cycling on and off all the time.
The pressure switch turns the system on at 20 PSI and off at 40 PSI. The accumulator tank smooths out pulses, cuts down on noise, and helps the pumps last longer. Each pump primes itself from up to 10 feet, can run dry without damage, and has thermal overload protection. The system is also ignition protected to ISO 8846 MARINE, so it's safe to install in engine rooms and other enclosed spaces.
It's popular on larger yachts and commercial boats, but the 52530-1100 works just as well on land. It's a good fit for 24V RVs, motorhomes, expedition trucks, emergency vehicles, off-grid cabins, and portable water systems that need plenty of flow from a DC supply. The 3/4-inch hose barb ports and pre-mounted layout make it a simple upgrade or replacement.
Key Features
- Two Par-Max 4 diaphragm pumps work in two stages to match water demand
- Built-in 2-liter bladder accumulator tank for smooth, steady pressure
- Pre-set pressure switch turns on at 20 PSI and off at 40 PSI
- Self-priming from up to 10 feet (3 m)
- Can run dry without damage
- Thermal overload protection
- Ignition protected to ISO 8846 MARINE
- Ready-to-run assembly on one compact base
- Less pump cycling and quieter running
Applications
- Fresh water systems on large yachts and cruising boats
- Workboats, charter vessels, and commercial craft
- 24V RVs, motorhomes, and expedition vehicles
- Emergency, fire, and utility service vehicles
- Off-grid cabins and remote homes with DC power
- Portable and mobile water supply units
- Buildings with several showers, sinks, and wash-down points
Specifications
- Part Number: 52530-1100
- Brand: Jabsco
- Type: Double stack twin diaphragm water pressure system
- Voltage: 24V DC
- Maximum Flow: 9 GPM (34 LPM)
- Single Pump Flow: 4.8 GPM (18 LPM)
- Pressure Switch: turns on at 20 PSI (1.4 bar), off at 40 PSI (2.8 bar)
- Maximum Current Draw: 8 amps
- Recommended Fuse: 15 amps
- Port Size: 3/4 in (19 mm) hose barb
- Accumulator Tank: 2 liters, pre-pressurized bladder
- Self-Priming: up to 10 ft (3 m)
- Pump Model: Par-Max 4 (x2)
- Dimensions: 13.6 in L x 12.2 in W x 13.6 in H (345 x 310 x 345 mm)
- Protection: Run-dry, thermal overload, ISO 8846 ignition protected
Frequently Asked Questions
Q: Do both pumps run every time a faucet is opened?
No. One pump starts first and handles low demand. The second pump starts only when more flow is needed, which helps even out wear between the two pumps.
Q: Can the 52530-1100 be used on a 12V system?
No. This model is wired for 24V DC only. Jabsco sells a separate 12V version of the Double Stack system for 12V electrical systems.
Q: Is a strainer needed on the inlet side?
Yes. Putting a strainer before the pump inlet keeps debris out of the diaphragms and valves and helps the system last longer.
Q: Can the system be mounted in any direction?
It's best mounted on a flat, solid surface in a dry spot that's easy to reach. Keep the hose runs as short and straight as you can so the pumps prime well.
Q: Can the 52530-1100 be used on land?
Yes. It works in any 24V DC fresh water system, including RVs, service trucks, off-grid cabins, and mobile water units.
CLRMarine
