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My water tank had been making a clanking/knocking sound intermittently for the last few days. It happens every 10 or 15 minutes and lasts about a minute or so... I seems to be coming from the pipes above the unit, not sure if it is the gas pipe, or the water lines. Any clues as to what this is and how I can stop/fix it?

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  • Water Heaters Master
  • 5,089 Answers

1) Remove the heat trap nipples or inserts, and replace with ordinary pex-lined nipples, and then make your own heat traps if desired:
http://waterheatertimer.org/Low-hot-water-pressure.html#trap

2) Add comment and saY WHAT you find

Posted on Jan 22, 2013

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6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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  • 50 Answers

SOURCE: hot water coming out of overflow pipe on my vulcan everhot water

Assuming you are talking about the temperatur/pressure relief valve, it is stuck open.

1. Turn off gas or electric to water heater
2. Close water supply to water heater
3. open hot water faucet on nearest fixture to depressurize hot water system.
4. close tpr valve (you may have to push in on the center spine. It may be resistant to closing from sediment. If so, opening and closing several times may solve that issue.

Once you get the tpr valve closed, close the faucet and open the supply valve. If the tpr stays closed, go ahead and turn on the gas/electric and re-light pilot and turn on control etc.

If the TPR blows again, you will need to replace it. YOu can buy a new one at any plumbing supply store. Shut down the heater again, drain a bit of water out using the valve on the bottom of the tank. there is probably copper pipe connected to the TPR valve which you may have to cut or maybe can just unscrew. The TPR threads out of the tank, install the new valve (make sure to use pipe dope or teflon tape.

Posted on Jan 04, 2009

mrgrzz
  • 88 Answers

SOURCE: no water from hot water faucet

thanks for your question, sounds to me like you have a frozen line, I used to live in Northern, MN on a well, and had alot of time un-thawing water lines, yes it is continuous flow, sorry for having to say this but you need to immediately start tracing your hot water lines and see if you have any leaks, bulges, or ice forming on the line, tap the line with a screwdriver to hear the difference in sound when you find the frozen section, here is the tricky part, if its (pecks line, plastic) then you need to call a plumber, if copper, you can use a torch to un thaw the line, but use extream caution when doing this as many people has accidentally started fires, my best advise is to call a plumber, hope that helped, please get back to us and let us know what you find, thanks again, mr.grzz

Posted on Jan 21, 2009

  • 1 Answer

SOURCE: water doesn't stay hot PowerStar AE3.4

Are you using a single lever faucet? The install guide does indicate that you may need to reduce the input from the cold water side to ensure that water stays at a consistent temperature (see page 7 of the installation and service manual). Also, remember, this is a SMALL hot water heater. So if you're running for any length of time at full output, it may not keep up with you (see page 8 of the service an installation manual). I found the manual online at http://www.airwater.biz/images_templ/bosch-water-heaters-ae3.4-manual.pdf.

Posted on Feb 01, 2009

  • 252 Answers

SOURCE: therm-x-trol st-12 leaking

Never seen one leak other from the seam or the top or bottom.

Posted on Mar 14, 2009

gary1121
  • 332 Answers

SOURCE: hot water is cutting out after 2 - 3 minutes whilst showering

check the screen on the cold water intake on the cold side,, you might have to flush the system out, and do you have the shower head water restricter in, if not you may be using to much hot water,,, how many other hot water fixtures are running at the same time? try running just the shower,,,if this is a tank water heater the dip tube could be bad that is on the cold side it takes the cold water to the bottom of the tank and forces the hot water out,, if you ar only getting a couple of min of hot water and the dip tube is bad it is not going to the bottom but just at the top and not getting all the hot water you will need a plumber

Posted on Jun 06, 2009

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Bradford White 40 gal water heater,works fine, but has started whining when not in "low" setting. Seems to only do it during showers, or when temps drop outside etc. Only lasts a few minutes


it is possibly a high frequence '"water hammer" from a failing tap washer
call a plumber to replace all the tap washers especially the shower hot water tap washer
water hammer is when the water flow is intermittently interrupted ( (normally as banging pipes) but when it is fast it appears as a whistle or squeal

Dec 17, 2016 | Water Water Heaters

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Hot water thermostats only lasting 15 minutes.My old Beasley solar hot water system is causing thermostats to stop working within 15 minutes of them being installed. I have had four new thermostats


try using the services of an electrician when fitting electrical components
the thermostats only stop/ start electrical power to the elements and will not control the temp of solar systems
if they physically burn the points , there must be an electrical short of some sort so an electrician in to test circuitry is in order

Jun 24, 2017 | Water Heaters

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How long does the model 81v52d last in years?


Did you clean sediment out of tank when replacing elements?
Did you replace thermostats? Thermostats go bad, or get out of calibration.
Copy following link for tank-type electric water heater troubleshoot:
http://waterheatertimer.org/How-to-troubleshoot-electric-problems-with-water-heater.html

Test elements.
Sounds like lower element is burned out.
Clean sediment out of tank. Check for water leak running hot water out of tank by putting ear against pipe.
Replace both thermostats.

Electric water heater will last 20+ years, IF ...
Electric water heater is totally unique because it can last forever with part replacement using parts from hardware store, as long as tank does not rust because of depleted anode rod, and pressure is kept below 80psi.
http://waterheatertimer.org/How-to-maintain-water-heater.html
Annual water heater maintenance will pay you $10 a month, tax free money in pocket, by avoiding tank replacement.

Nov 25, 2012 | Water Heaters

1 Answer

Shower goes cold intermittently like there is a restriction in hot water delivery. Plenty of hot water when it comes back, but the cold blast is not fun. No shortage of hot water for long showers or...


Has nothing to do with the expansion tank, the expansion tank whole enough air so that when the heater heats the water it does not build up pressure. You know from school that you can compress ait. you CAN NOT compress water. When you haet water it expands until it turns to steam. So lets rule that out.

First look at all the plumbing in the house where there is a cross conection. This would be like a shower valve that has a personal shower head on it. and you turn of the water using the personal shower handle and not the valve at the wall. This then would let cold water to go into the hot water side piping.

Most people do that with out knowing it at the laundry sink. they put a hose on to was the dog and forget to turn off the faucet and then BANG cold water in the hot side.

Go around the house and turn off all the faucets and valves by using the handles. no add on things.

Now last could be the shower valve itself. . Do this happen in just one shower or all of them???

If its just the one and you spend the day doing the walk around, even check the bidet if you have one

its the valve. you need repair to that.

Best of luck in your hunt Tom

Sep 08, 2011 | Amtrol ST-5-C THERM-X-TROL ASME Expansion...

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I own a house with an electric GE hot water heater. 8ESOT12AA01 Serial # 090122 5750 I do not know how old the hot water heater is and advice about when it should be replaced. No leaks to date but I...


GE is made by Rheem, but the market is always changing. Rheem-based serial number shows tank was made in 1990.
Tank will last as long as anode rod(s) protects steel tank from rusting.
If your tank has two anode rods, then tanks lasts longer.
That's how companies determine if water heater is '6-year' or '12-year.'
I don't have manual for your product to say if you have 12 year tank. Side of tank might have information blurb besides mandatory label that shows serial number.
You can update your water heater by replacing anode rod(s) assuming they can be loosened and removed after this number of years, which is a big IF with old heaters. Your plumber might have impact wrench he uses to see if anode can come out.
http://waterheatertimer.org/Replace-anode-rod.html
http://waterheatertimer.org/Leaking-water-heater.html

If the water heater is making gurgling rumbling and/or crackling sounds then tank has sediment build-up.
You can also get a baseline of rust by flushing tank and watching if water is very rusty.
http://waterheatertimer.org/Clean-sediment-out-of-water-heater.html
http://waterheatertimer.org/Water-heater-will-not-drain.html

If you flush tank regularly, and inspect anode every 1-3 years, a tank will last many years longer than manufacturer's label.
http://waterheatertimer.org/Water-heater-manufacturers.html

Apr 20, 2011 | General Electric Water Heaters

1 Answer

Hot water is cutting out after 2 - 3 minutes whilst showering


check the screen on the cold water intake on the cold side,, you might have to flush the system out, and do you have the shower head water restricter in, if not you may be using to much hot water,,, how many other hot water fixtures are running at the same time? try running just the shower,,,if this is a tank water heater the dip tube could be bad that is on the cold side it takes the cold water to the bottom of the tank and forces the hot water out,, if you ar only getting a couple of min of hot water and the dip tube is bad it is not going to the bottom but just at the top and not getting all the hot water you will need a plumber

Mar 21, 2009 | Water Heaters

1 Answer

Elec. hot water heater


thanks for your question, sounds to me like you have a burned out bottom element in the tank, depending on how old the tank is, the amount of calcium in the tank, will determine if you should repair or replace, if your tank is fairly new, then you will first have to shut the power off to the tank, turn the water off at the shut off, drain the tank, write down the model #, the serial #, what brand, and the ratings on the lower element too, go to the hardware store, buy a new element and element wrench, return home, write down which wire goes where on the element, very important ! remove wiring, remove element, that's the hard part most of the time, install the new element, rewire, close all panels, refill tank, do not turn the tank on before filling !! then after tank is full, turn power back on, you will have to wait about an hour for hot water, if the unit looks to old, then replace it. I would say anything over ten years is worth replacing, hope that helped ya, thanks again for your question, let us know what happens, mr.grzz

Jan 12, 2009 | Water Heaters

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