knocking noise

[adrew]

latley when i turn water on in the house my water heater gas that is makes a loud knocking noise for about 2 to 3 seconds thanks whats up. also it does not leak or anything and is 2 years ols

[DUNBAR PLUMBER]

When was the last time the tank was drained?

[adrew]

never ,also do i have to turn off the gas to drain it.thanks

[DUNBAR PLUMBER]

Follow this thread in order to drain the tank.




http://forum.doityourself.com/showthread.php?t=196110