Bokkee
A 12V water pump pressurizes the RV's water system from the fresh-water tank. If you always run on city water and your pump works, you may not need one.
RV owners replacing a worn pump or adding tank water.
It names a warranty of 3-year. Check the listing for the terms.
Upgraded 12V RV Water Pump – 5.0 GPM 45 PSI Ultra-Quiet Diaphragm Pump with Smart Pressure Switch – Self-Priming up to 10 Ft – Direct Replacement for Camper, Marine, Boat & Trailer (ASIN B0H1CFBQH3). Amazon's page has the current price, specs and reviews.
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Check current Amazon listing (ASIN B0H1CFBQH3).
Fine print: The Dude has not personally tested this product. The details on this page come from the Amazon listing and can change; check the listing for the current specs, price and availability.