It is not old. It only does this knocking thing when it turns on. What can we do to fix this?
2007-02-01 00:43:34 · 8 answers · asked by H 3 in Home & Garden ➔ Maintenance & Repairs
It's caused by calcium deposits and other sediments in the tank. A water heater should be flushed every six to twelve months or so to keep it at peak performance. I think it's time to drain and flush your tank. It's an easy process and only requires that you shut off the cold water inlet valve. Open a hot water tap somewhere in the house. Attach a hose to the drain valve on the tank, and let the water run into a suitable drain, or out the back door. To refill, reopen the cold water inlet valve, when the water runs clear, close the drain valve and the hot-water tap. Finished
Good luck
2007-02-01 04:42:23 · answer #1 · answered by stretch 7 · 1⤊ 1⤋
the noise you hear is from solids building up in the bottom of the tank. when the noise starts it is usualy to late to flush them out unless you can get inside and break them up a bit. Electric water heaters build up quite quickly because of the localized heat scources. Gas water heaters take some time to build up usualy unless it is on a well and solids are not filtered out they will deposit in the tank. when the heat comes on the noise you hear is expanding steam made from the water in between the sediment. Once it expands and escapes from the sediment the surrounding water accepts the extra heat and it condenses back to liquid again. this process will be continuous but not as energetic as the water heats up.
2007-02-01 06:29:35 · answer #2 · answered by oreos40 4 · 3⤊ 0⤋
The only problem is that you have air in the system and the knocking is the differences in trying to push air is easier than pushing water and the air compresses and decompresses which pressurizes and depressurizes the pipes which cause them to move and hit their holding brackets and other assemblies as the air bubble runs through the house!! simply bleed the system at the highest point and the problem should go away.
2007-02-01 01:32:26 · answer #3 · answered by biodragon1 2 · 1⤊ 1⤋
Does it get warm returned after a minute? now and returned the pipes are insulated at distinctive ranges and as such water interior the pipes gets chilly specifically sections. i might make sure you insulate all your warm water pipes. in case you have a tankless water heater, you may nicely be experiencing the "chilly water sandwich". you may google to study up on it.
2016-11-02 01:09:13 · answer #4 · answered by ? 4 · 0⤊ 0⤋
If you have hard water in your area that could cause it. I don't know exactly why it does it, but my heater is only a few years old and does the same thing.
2007-02-01 00:52:50 · answer #5 · answered by JET_DOC 2 · 1⤊ 1⤋
What you are hearing is the materials in the tank expanding when the heat is put to them. They are constrained by their shape and size and by the shape and size of the components attached to them. You will hear it again but to a much lesser extent when the flame goes out, because the cooling off process is slower than the heating process.
2007-02-01 01:24:27 · answer #6 · answered by MT C 6 · 1⤊ 3⤋
It sounds like an air blockage, is the pressure ok?
2007-02-01 00:50:15 · answer #7 · answered by ? 3 · 1⤊ 1⤋
you have air in the line.. you need to "bleed" the line and get the air pocket out..
2007-02-01 10:37:05 · answer #8 · answered by nefan69 2 · 1⤊ 2⤋