ACQUAFLO 55 PSI Diaphragm Pump Boat Marine Caravan RV Water Pump 4.2 GPM 12V

The Acqua Flo AFDP403-4045 is a robust 12V self-priming diaphragm pump designed for reliable, on-demand water delivery across marine, RV, caravan, and off-grid applications. Featuring a built-in pressure switch, the pump starts automatically when water demand is detected and stops when pressure is restored — no manual intervention required.

Key Features

Automatic Pressure Switch
Starts and stops on demand — activates when a tap opens, shuts off when pressure is restored.

Self-Priming
No manual priming needed. Draws water from source automatically from first use.

Over-Pressure & Overheat Protection
Built-in safety cut-offs protect the motor and pump from damage in fault conditions.

Run Dry Safe
Can operate dry for up to 30 minutes without damage — ideal for intermittent systems.

Low Noise Operation
Quiet diaphragm mechanism — suitable for cabins, caravans, and living spaces.

4-Chamber Diaphragm
Smooth, steady flow with reduced pulsation vs single or dual-chamber designs.

CERTIFICATIONS

ISO 9001
Quality Management

ISO 8846:1990
Marine Ignition Protection

CE Marked
EU Conformity

NSF 61 Certified
Drinking Water System Components – Health Effects

RoHS Compliant
Restriction of Hazardous Substances

CSA Certified
Canadian Standards Association

N/A (Not Applicable)

o Model: AFDP403-4045 
o Voltage: 12V DC
o Current Draw: 5.8A
o Flow Rate: 17.0 LPM / 4.2 GPM
o Max Pressure: 40 PSI / 2.8 BAR
o Max Lift: 20 Metres
o Power:168W
o Pump Design: 4-Chamber Diaphragm
o Motor Type: Permanent Magnet
o Body Material: Polyamide 66 (PA66)
o Port Size: 1/2" (14mm)
o Max Liquid Temperature: 60°C
o Weight: 2.3 kg