Agree with markb5900... I like to connect to city water pressure and purge all the air from both cold and hot, shower, toilet, and all sinks. Then fill the fresh water tank. shut the city water pressure off and listen for the pump to start. If not started (make sure it is turned on. lol..) then run the sink water and listen again. Make sure it stops pumping when the water is turned off. Then turn on the water heater.
Don & Dona W/yorkies Gizmo, Master Chief, & Tali
2011 Flagstaff 8528 BHSS 2015 Ford 6.7 XLT
2010 Full Timers & Still Going