The ES brings variable speed technology to virtually any RV water system. Smaller coaches can be upgraded with the ES, because this pump has been specifically designed for after market installations. Powerful Flows â The ES delivers a 3.5 gpm flow rate, higher than nearly anything else for the RV industry. Reduced power consumption helps ensure compatibility with existing electrical systems. Silent Operation â The ES version is even quieter than the Aquajet RV version. The patented, variable speed controller and "soft-start" features eliminate most cycling related noises. Easy Installation â Lower amperage draws eliminate the need to use electrical relays, etc., regardless of current electrical configurations. Installation is simplified to the point of true "plug-and-play performance.â 55 Aquajet AES, 6.5 Amp Water Pump. 12VDC 3/4" Quick Attach, Lead Wires Fittings Included | Power RV Series Aquajet-AES RV Water Pump