Calcium Buildup The electric heating element inside the RV water heater was caked on with so much sediment that it has to be pried out to remove it. Now we are showing the RV owner how to flush their water heater so the sediment doesn’t build up and restrict their water flow in the future. We recommend you flush your water heater at least once a year for seasonal camping and 2-3 times a year for full time living. #Rvmaintenance #rvmaintenancetips #rvlivingfulltime #rvliving #rvmobiletech #rvmobi