Gidrox
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.
Gidrox 12V RV Water Pump, 4.0 GPM 45 PSI Diaphragm Pump, 12Volt Quiet Fresh Water Pump with Pressure Switch, Self Priming Pressure Pumps for RV Camper Boat Marine Food Truck (ASIN B0GGGMZMW7). Amazon's page has the current price, specs and reviews.
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Check current Amazon listing (ASIN B0GGGMZMW7).
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.