Use the tank saver; all it takes ia 10 minutes twice a year! All RV water have trapped sediments which shorten the life of the heater. Sediment build-up also decreases the water capacity of the heater. Until now, there's been no way to rid your water heater of this buld-up. Now there's the quick, easy-to-use Tank Saver. The tip has a unique squenched D Port design that fans out a powerful even spray.