Appliance manufacturers strongly recommend annual maintenance that includes draining and then flushing your water heater.
Sediment that accumulates every year in your tank causes two problems in water heaters. First, it leads to tank corrosion. Second, it reduces the effectiveness of the water heater.
This valuable 13" long flexible plastic tube effectively flushes the sediment out of the tank and extends the life of your water heater. Simply remove the drain plug from your water heater, attach this tool to your garden hose and insert it into the drain hole. Turn on the valve and send a concentrated stream of water into all reaches of your water heater tank.
Every vintage trailer should own one.