Sometimes brown water comes out of the hot-water faucet. There must be sediment in the water heater. How do I drain the water heater and get rid of the brown water?
Attach a garden hose to the drain-valve on the lower edge of the water heater. Route the other end to a drain or laundry tub. Open the valve carefully, because the water will be hot. Drain about five gallons, wait a few hours, and then drain again. This procedure will remove any loose particles from the tank.
Since most drain valves are inexpensive and rarely used, you can expect a leak at the valve once you open it. A drip from the valve-stem (a round metal shaft connecting the handle to the valve) can be corrected by tightening the packing nut around the stem. A drip from the threaded spout can be handled with a hose-cap and a rubber washer.