Flojet 4000 Series Demand Pump – 12V
Part No: R4300-504A

The Flojet 4000 Series Demand Pump is a compact and reliable 12V diaphragm pump designed for demanding applications where consistent flow and pressure are required. With a Santoprene diaphragm and Viton check valve, this pump delivers durability and chemical resistance across a wide range of cleaning and fluid transfer tasks.

Key Specifications

• 3.1 bar switch setting

• 19.5 L/min max flow rate

• 12V DC, 13.0 Amps

• Santoprene diaphragm

• Viton check valve

• 3/4" hose barb ports

• Self-priming up to 2.4m

• 54°C maximum fluid temperature

• Integrated pressure/demand switch

• Thermal overload protection

• Polypropylene pump housing

Product Status
As of July 2025, this model is no longer in production. Flojet has consolidated a number of legacy Quad Series pumps into the new Versijet 4 Chamber range. These updated pumps have the same mounting footprint and port dimensions as the Quad Series, making replacement and upgrade straightforward.

Alternative Options
Please see Versijet replacement pumps listed below for the equivalent updated models, or contact our Sales Team for advice on selecting the right replacement.