Compact 12V diaphragm water pressure pump for marine and RV use, delivering reliable on‑demand water supply with quiet operation and thermal protection.

• The water pressure pump - 42 series has: a 4‑chamber diaphragm pump, on‑demand long‑life pressure switch, adjustable pressure switch.
• Flow 11.3 L/min (3.0 GPM); cut‑in pressure 41 PSI ±5 PSI (2.8 ±0.3 bar); shut‑off pressure 55 PSI (3.8 bar).
• Self‑priming to 1.8 m (6'); max draw 7.0 A; 12 V DC.
• Temperature limit 60°C (140°F); thermal overload protection; rubber mounting base for noise reduction.
• Valves: EPDM; diaphragm: Santoprene; inlet/outlet ports: 1/2"‑14 MNPT.
• Internal bypass reduces cycling; industry standard mount pattern; wire: 16 AWG x 24 cm.
• Weight 1.9 kg (for 3.0 GPM); 4‑year warranty.

Download manual (PDF)