Atwood gas hot water heater question

[NanciL]

Our Atwood has been working fine for the past five years and still is but about a week ago developed a weird noise when we run hot water.
There is a loud gushing noise. It is hard to describe the noise, but it almost like it is sucking air or something.
We don't get the noise when we are running cold water.
It is definitely coming from the water heater, but I can't figure out what it is.
Looking at it from the inside of the trailer and the outside, I don't see any leaking

Has any one else ever had this happen and can describe the fix.

I am thinking possibly the safety relief valve

Jack L

[NanciL]

As long as I am going to replace the check valve; wwhich would be the best:
1. to replace what I have
2. Or install a shut off valve in it's place

Jack L

[NanciL]

Thanks on that check valve guys.

I'll take it apart as soon as we get home and I drain the tank

Jack L

[JJBIRISH]

It is the check valve located on the hot water out side of the HWT…

[nomad297]

NanciL wrote:

nomad297 wrote:
It is not the T&P valve. It is a restriction somewhere -- possibly a valve (shutoff) that is not turned on all of the way, or a check valve that has failed, or a dip tube that has fallen off, or a bunch of sediment that has gotten lodged somewhere. Do you notice any difference of flow between the hot side and cold side of any of your faucets?

Bruce

Nope.
There is no difference.
If I don't get any constructive advice here, I'll go ahead and replace the safety valve.

You don't find this advice constructive?

It IS NOT the T&P valve, or what you are calling a "safety valve."

Bruce

[lasttruck]

Anti-backflow valve is a good start. Also check the valves if you have a water heater bypass kit installed.

[Gunship_Guy]

It could be the spring in the backflow preventer on the back of the water heater. They get weak and vibrate/rattle when water is rushing through.

It is located on the hot side which is the line coming out the top rear of your water heater.

[NanciL]

nomad297 wrote:
It is not the T&P valve. It is a restriction somewhere -- possibly a valve (shutoff) that is not turned on all of the way, or a check valve that has failed, or a dip tube that has fallen off, or a bunch of sediment that has gotten lodged somewhere. Do you notice any difference of flow between the hot side and cold side of any of your faucets?

Bruce

Nope.
There is no difference.
If I don't get any constructive advice here, I'll go ahead and replace the safety valve. The pressure in both the hot and cold are as good as they always have been.

Jack L

[nomad297]

It is not the T&P valve. It is a restriction somewhere -- possibly a valve (shutoff) that is not turned on all of the way, or a check valve that has failed, or a dip tube that has fallen off, or a bunch of sediment that has gotten lodged somewhere. Do you notice any difference of flow between the hot side and cold side of any of your faucets?

Bruce