<p>Is this a gas fired water heater? Does it leak? Has the water heater ever been serviced (i.e. drained to remove sediment from the bottom of the tank)?</p>
<p>If the tank is not leaking, try the following:</p>
<p>Turn off the gas to the water heater. There should be a lever on the gas line leading to the gas valve of the water heater, </p>
<p>Turn off the cold water leading to the water heater.</p>
<p>There is a pressure relief lever near the top of the water heater. The lever is attached to a metal pipe leading to the floor. Place some rags on the floor under the pipe. Lift the lever for a few seconds to release air in the system. Some water may come out of the pipe.</p>
<p>Open a hot water tap somewhere in the house to move water out of the plumbing.</p>
<p>At the bottom of the water heater is a drain valve with a threaded end that fits a garden hose. Attach a hose to the drain valve and route it to the nearest floor drain. Or place a bucket under the valve and turn the plastic knob to release water from the tank. Be careful, the water will be hot. Drain a gallon at a time. If the water draining is gray in color, it has sediment from the sacrificial anode rod inside the tank. Keep draining water from the tank until it runs clear.</p>
<p>If there is a lot of sediment in the tank, it will act as an insulator and slows the water heating capacity of the water heater. The gas burner stays on longer than necessary which stresses the glass lined water tank which leads to cracking of the glass and leaking.</p>
<p>Once the water runs clear, close the drain valve, turn the cold water back on and then turn on the gas. You may need to turn on the hot water taps in the house to insure that any trapped air in the plumbing is flushed from the system.</p>
<p>This procedure should be done every couple of months.</p>
<p>Good luck!</p>
<p>Tankless water heater…? If you’re thinking of selling your house in a couple of years, you will never see a return on your investment. </p>
<p>I have a cheap 40 gal GE gas water heater with a six year warranty. Going on strong for five years with no problems… The instructions recommended not using an insulating water heater blanket since it was built with sufficient insulation to retain heat. </p>
<p>Avoid Whirlpool gas water heaters. Do an on-line search and read about the gas valve problems that thousands of people have had with these units! Whirlpool uses a non-standard gas valve that most part stores do not carry.</p>