Welcome to iRV2.
With the fresh tank full and the 12 volt pump on , when the park pressure drops below the pumps pressure sensor , it will cut in and boost the pressure to the pump limit .
Works well , I've had the pump cut in a number of times . Beets the { self edit } of of a drippy shower head , while trying to get all the soap off .
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99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.
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