Flojet 4524-500 VSD Variable Speed Diaphragm Pump:

The Flojet 4524-500 VSD Pump (also listed by Xylem Flojet under model numbers 04524-500 and 04524-500A) is a premium, 115V AC variable-speed diaphragm pump engineered to deliver constant, reliable water pressure without the need for bulky accumulator tanks or standard pressure switches.
By using an integrated Variable Speed Drive (VSD) module, the motor automatically speeds up or slows down to exactly match your real-time water demand, providing a smooth, city-like water flow while preventing annoying pump cycling and reducing noise.
Due to its robust construction and steady-state pressure handling, this pump is widely utilized for:

• Commercial beverage operations like mobile coffee carts, kiosks, and water-boosting stations.
• Industrial cleaning equipment, commercial carpet cleaning machines, and low-pressure car wash systems.
• Off-grid cabins and water harvesting systems drawing from fresh water tanks or well-water storage

Core Technical Specifications

• Flow Rate: Delivers 1.0 to 4.5 Gallons Per Minute (GPM).
• Pressure Control: Electronically maintains a consistent 45 PSI.
• Power Source: Plugs directly into standard 115V / 120V AC single-phase outlets.
• Priming Ability: Self-priming up to an 8 to 10-foot vertical suction lift.
• Material Build: Built with a chemical-resistant Polypropylene housing, Santoprene diaphragm, and EPDM valves.

Performance & Design Highlights

• No Accumulator Tank Needed: The real-time speed adjustments mean you save physical space and installation costs by completely omitting a pressure tank.
• Maintains steady fluid pressure in response to variable flow demand
• No pressure switch
• Conserves energy, low amp draw
• Quiet running under normal use
• Automatically adjusts motor speed to maintain pressure
• Improves overall system performance
• Eliminates bulky accumulator tank for limited space requirements
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Specifications:

• Pump Design: Positive Displacement Diaphragm (4 Piston)
• Power Source: AC
• Materials: Polypropylene housing, Santoprene* diaphragm,
• EPDM check valves
• Fluid Temperature Limits: 130? F (55? C)
• Weight: 6.63 lb (3.0 kg)
• Motor: Permanent Magnet Rectified
• Amp Draw, 115 V: 1.34 Amps (@ 45 PSI)
• Flow Rate, 115 V: 5.0 GPM (19 LPM) - Open Flow
• Voltages: 115 V
• Cycles: 60 Hz Recommended Duty Cycle: Intermittent
• Dimensions: 3.75" H x 6.30" W x 9.00" L (95 mm x 160 mm x 221 mm)
• Approvals: UL listed, NSF pending
• Warranty: 1 Year