I drained my fresh water tank and forgot to turn off the pump. Might have ran dry for almost a day before I found it. It still pumps but I was wondering how much damage I did.
The RV water pumps have a Thermal overload built in. They will run until the motor temp kicks the motor off and once it cools down will run again, so the pump rarely runs full time when the tank is empty. This helps prevent pump failure. But letting this go for days or weeks will destroy the pump unless you have no shore power and the battery eventually goes dead. Doug