wassermann RV 12V Water Pump 5.0 GPM 55 PSI — Self-Priming Diaphragm with Pressure Switch (Includes Fittings & Filter)

The WASSERMANN RV Water Pump is a 12V self-priming diaphragm pump that delivers up to 5.0 GPM at 55 PSI with an integrated pressure switch for automatic on/off operation.

This compact, ready-to-install pump kit is built for mobile and off-grid water systems in RVs, campers, boats and small marine applications. It comes as a complete package with hose fittings and an inlet filter, so you can replace an old unit or set up a new potable water circuit quickly. The pump’s corrosion-resistant construction and dry-run protection are designed to handle intermittent use and the demands of travel without constant maintenance.

How does this pump behave when you open or close a tap?

The WASSERMANN pump features an internal pressure switch that senses demand and switches the motor on when a faucet is opened, then stops automatically when pressure is restored. This hands-off action prevents continuous running and conserves battery power while maintaining steady water delivery for showers, sinks and deck hoses.

• Automatic start/stop via built-in pressure switch
• Maintains approximately 55 PSI for consistent flow
• Prevents overrun to extend motor life and save energy

What power and plumbing connections are required?

This pump runs on standard 12V DC power, making it compatible with RV house batteries and many vehicle accessory outlets. The kit includes 1/2" barbed hose fittings and a 1/2" male-thread adapter so you can attach common freshwater hoses or integrate it with typical RV plumbing lines.

• 12V DC motor that connects to a battery or 12V supply
• Included 1/2" barbed and 1/2" male-thread adapters for quick plumbing
• Filter element supplied to catch debris and protect the pump internals

What performance can you expect in everyday use?

The pump is rated for up to 5.0 gallons per minute at about 55 PSI, delivering strong, usable water pressure for kitchen and bathroom fixtures in an RV or small boat. Its self-priming diaphragm design enables reliable starts after short dry spells and helps reduce the need for manual priming when mounted above the water source.

• Up to 5.0 GPM flow rate suitable for sinks and showers
• Self-priming diaphragm reduces startup fuss
• Corrosion-resistant components that tolerate marine and mobile environments

What does the kit include and how durable is it?

The WASSERMANN kit arrives with the pump, two 1/2" barbed hose adaptors, one 1/2" male-thread adaptor, an inlet filter to protect against particles, and a user manual for straightforward installation. The unit is engineered for rugged use with materials that resist corrosion and features dry-run protection to minimize damage if the water source runs low.

• Complete kit: pump, hose adaptors, thread adaptor, filter, manual
• Built-in dry-run capability to reduce risk during low-water conditions
• Designed for frequent starts and stops typical in mobile water systems

Who is this for? RV owners, marine hobbyists, campervan converters and anyone who needs a dependable 12V freshwater pump with automatic pressure control will benefit from this WASSERMANN unit. It’s especially suitable for retrofitting older systems or replacing worn pumps where robust flow, self-priming capability and simple plug-and-play plumbing make installations faster and more reliable.