Speaking of water heaters: When you remove the bull-plug on the outside of the heater to drain it, or check the anode, be sure to turn off the water pump and OPEN THE HOT WATER FAUCET to drain pressure from the water heater.
Otherwise, when the last thread holding the plug turns loose, it will blow out in your face and cover you with water like a fire-hose. And, the water will probably contain sediment and other gunk, making your bath even more gritty. And hopefully you are doing this with cold water in the tank.
