My PDI was performed with shore power and city water hooked up. A small amount of water was put into the tank in order to run the pump.
Fact is, the actual PDI on my camper was performed by the service department before I arrived on the scene. Once I arrived, we did a walk through/demonstration/orientation. If I had been able to find any problems then, they would certainly have been addressed, but I have never been able to find anything they missed.
2014 Coachmen Catalina 253RKS
2016 Keystone Summerland Mini 1750RD
2012 F250 Lariat 6.2L Crew Cab FX4
Reese dual cam SC/WDH