12V/24V Self-Priming Water Pump with Smart Auto Pressure Switch

Key Features

• Smart Auto Pressure Switch – Open Tap to Start, Close to Stop: Reliable, low-current intelligent pressure switch activates the pump when a tap is opened and cuts power when the tap is closed — fully automatic, energy-efficient, no manual intervention required.
• Quick-Connect Pump Head – 4 Fittings Included: Universal 3/4" quick-connect pump head with 360° installation flexibility. Comes with 4 black nylon fittings: 41F001 (elbow barb), 41F004 (straight male thread), 41F003 (straight barb), 41S03 (3/4" female quick-connect). Connect to any standard outlet without additional adapters.
• Integrated Design – Near Zero Maintenance: Pump head and internal components use an integrated design — virtually no manual part replacement required over the pump’s service life.
• Anti-Vibration Rubber Feet: Four rubber mounting feet absorb motor vibration even on hard surfaces — significantly reduces noise and structural vibration transfer to hull or chassis.
• Built-In Bypass Pressure Relief Valve: Internal bypass reduces cycling frequency and lowers operating noise — smoother, quieter performance under variable demand.
• Premium Quiet Motor: High-quality motor runs quieter than an indoor ceiling fan — suitable for use in sleeping areas of RVs and boats.
• Adjustable Long-Life Pressure Switch: Pressure cut-in/cut-out range fully adjustable from 1.2 kg to 4.1 kg (17 to 58 PSI) — dial in the exact pressure for your system.

Included Fittings

• 41F001: 3/4" QC × 1/2" hose barb – HS elbow + O-ring, black nylon
• 41F004: 3/4" QC × 1/2" male thread – straight male + O-ring, black nylon
• 41F003: 3/4" QC × 1/2" hose barb – HS straight + O-ring, black nylon
• 41S03: 3/4" QC × 1/2" hose barb – 3/4" female quick-connect, black nylon

Ideal Use Cases

• 🚐 RV / Motorhome: Pressurized water supply for sinks, showers, and toilets on board
• 🚤 Boat / Marine: Freshwater system pressurization, deck wash, galley supply
• 🌿 Agricultural / Irrigation: Low-voltage field irrigation from tank or pond
• 💧 Water Transfer: Tank-to-tank transfer, remote water supply points
• ⛽ Off-Grid / Solar Systems: 12V/24V compatibility ideal for solar-powered water systems

Installation Notes

Mount the pump on a flat surface using the 4 rubber feet. Select the appropriate fitting from the 4 included nylon fittings and connect to your outlet hose or pipe. Connect the inlet to your water source. Wire to a 12V or 24V DC power supply. The pressure switch handles all automatic start/stop operation — no additional controller needed. Adjust the pressure switch screw to set your desired cut-in/cut-out pressure within the 1.2–4.1 kg range.

Why Choose This Pump?

Most 12V pumps either run continuously (wasting power and wearing out fast) or require manual switching. The smart pressure switch on this pump solves both problems — open a tap and water flows, close it and the pump stops. The 4 included quick-connect fittings mean you’re not hunting for adapters on installation day, and the anti-vibration feet and bypass valve mean you’re not listening to a rattling pump all night.

• Model: NMDP41-G33-100
• Voltage: 12V DC / 24V DC
• Open Flow: 12.5 L/min
• Operating Current: 2.0 A
• Max Current: 4.1 A
• Pressure Range: Adjustable 1.2 – 4.1 kg/cm² (17 – 58 PSI)
• Pump Head: 3/4" Quick-Connect (360° installation)
• Included Fittings: 4× black nylon (41F001 / 41F004 / 41F003 / 41S03)
• Switch Type: Smart auto pressure switch (low current)
• Bypass Valve: Built-in pressure relief bypass
• Mounting: Anti-vibration rubber feet (4×)
• Color: Blue + Silver
• Country of Origin: China