I run mine off of the water pump every month or so to keep my fresh water tank fresh. I run a couple of loads along with a shower or two and then fill the fresh tank again for when it is needed. I always keep my fresh tank full for those times that campground water is off.
2006 GMC 2500HD CCSB 4x4 Duramax/Allison, Titan 52 gallon fuel tank, Prodigy Controller, B&W Companion Hitch
2010 Jayco Designer 35RLTS, Cummins/Onan RV QG 5500 EVAP, Progressive Industries EMS-PT50X, TST Systems 507 TPMS, RV Flex Armor Roof