wassermann 12V RV Water Pump 5.0 GPM 55 PSI — Self-Priming Replacement for 4008-101-A65 with Pressure Switch

WASSERMANN's 12V RV water pump is a self-priming diaphragm pump delivering up to 5.0 GPM at a preset 55 PSI, built as a direct replacement for 4008-101-A65 to supply reliable water to RV kitchens, bathrooms, and small marine systems.

This compact, ready-to-install pump arrives as a complete kit with hose adapters, a debris filter, and a user guide so you can swap it into your camper, yacht, or garden system quickly. Engineered for 12-volt DC operation, it runs from standard vehicle battery sources and is controlled by an integrated pressure switch for automatic on/off performance when taps open and close.

How easy is it to install this pump in my RV or boat?

Installation is straightforward for anyone familiar with basic plumbing and 12V electrical work. The kit includes barbed hose fittings, a threaded adaptor, and a filter to match typical RV plumbing; mounting holes fit common pump brackets.

• Includes 1/2" barbed hose adaptors and one 1/2" male thread adaptor for common hoses.
• Clear user manual outlines electrical connections to a 12V battery or cigarette lighter plug.
• Mounting points align with standard bracket patterns for quick secure attachment.

Will this pump deliver steady pressure for showers and faucets?

The WASSERMANN pump maintains a consistent 55 PSI setting and can push up to 5.0 gallons per minute, providing dependable flow for sinks and compact showering setups. The integrated pressure switch prevents continuous run by stopping the motor when outlets are closed.

• Rated up to 5.0 GPM to support multiple light fixtures one at a time.
• Pressure switch starts and stops the pump automatically with tap use.
• Self-priming action reduces air-lock issues during initial startup.

How durable and safe is the pump for long-term mobile use?

This unit is built for harsh and mobile environments with corrosion-resistant components and dry-run protection to extend service life. Materials and design reduce wear from vibration, temperature changes, and intermittent operation typical in RV and marine settings.

• Corrosion-resistant housing suited to freshwater and marine environments.
• Dry-run capability protects the motor when water supply is low.
• Robust diaphragm design minimizes maintenance and extends lifespan.

What power options and wiring considerations should I plan for?

The pump runs on 12V DC, allowing straightforward connection to your vehicle battery or 12V accessory outlet. Ensure wiring gauge and fuse protection match the pump's amperage for safe, efficient operation.

• Operates from standard 12-volt battery systems found in RVs and boats.
• Recommended fuse and wire sizes included in the user manual guidance.
• Simple electrical hookup supports both hardwired and plug-in installations.

Who is this for: DIY RV owners, boaters, and campervan converters who need a compact, dependable 12V water pump to replace a failing unit or to install in a new water system. It suits people who value a full kit with fittings and a filter, want automatic pressure control for hands-off use, and prefer a corrosion-resistant, self-priming pump that performs well for sinks, showers, and onboard freshwater systems.