Question about Water Heaters

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Keeps leaking water from drip pipe have changed pressure releif valve and pressure limiting valve water dosent seem to stay hot enough keep running out of hot water quicker than normal have noticed some rust stains around bottom of cylinder it is kept outside of back of house cylinder is also 10 years old has it had its day thankyou

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  • muscles8 Jul 15, 2009

    hi where abouts is the inlet screen thanks

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  • Master
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This valve must be replaced depressurize the tank by shutting off the pipe valve that feels cool pipe coming in at the top of tank, then at the bottom open up the valve to drain out about a gallon then use a pipe wrench to unscrew the leaky valve at the top then aquire a new valve and reinstall, then open up feeder valve at top to refill the tank and bleed out the air with the new valve you just installed. bleed by pressing down on the lever on the valve until water comes out release and then your done.

Posted on Jul 15, 2009

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  • Water Heaters Master
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Is that a gas water heater or a regular water heater? If it's a standard water heater, you may follow check the following:

1. Is it protected by a water softener?
2. Have you cleaned the inlet screen?

Your problem is likely in one of those areas. If not them then you may have to backflush the heat exchanger (if you don't have a softener). The manual tells you how to do that.


FOR GAS WATER HEATER:

First check the gas line and make sure that the pilot light is burning. If the pilot light is not burning, relight it according to the directions on a metal tag usually fastened to the front of the heater tank. No tag? Then follow these relighting instructions:


1)Turn the gas lever or handle to the setting marked "Pilot." It will be marked on the control.
2) Press down on the reset button, also on the control panel. It should be marked, or it will have a red-colored cap. Hold this button down.
3) Reach into the opening and hold the match to the thermocouple pilot. You may need to keep the pilot light button depressed for up to a minute until the thermocouple warms and keeps the pilot lit.
Be careful with the match so as not to burn your fingers. If the pilot will not light or stay lit you may need to replace the thermocouple (see section on "Changing A Thermocouple").

Hope this helps and have a great day!




Posted on Jul 15, 2009

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Boiler losing pressure and overflow pipe dripping water


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Water came out on the overflow pipe and kept running.


The releif valve will open if the water gets to hot to discharge hot water out or the relief valve is gone bad and needs to be replaced. the relief vlave protects the heater from high heat and build up of pressure from it over heating.

Feb 11, 2011 | Rheem 40 Gallon FVR NATGAS Low WATER...

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Pressure releif valve leaking


Hot water pressure relief valves serve two functions. The first is to remove high-pressure water from the hot water tank. The second function is to act as a high temperature valve to remove water that exceeds a predetermined point for the valve. Both of these relief settings are preset at the valve factory. Many pressure relief valves will come with a metal tag that identifies these release points. If you're attempting to remove the hot water heater pressure relief valve, pay careful attention to ensure that you replace with the correct valve.

Your hot water heater has a pressure relief valve safety mechanism. When pressure inside the water tank exceeds certain limitations, the valve opens up to allow the pressure to be released. A faulty pressure relief valve will not release excess pressure, which could cause extensive damage to your home. You should test the hot water heater pressure relief valve once every six months to ensure proper operation. If the pressure relief valve fails the test, replace the valve with a new one immediately

Locate the pressure relief valve on your hot water heater. The pressure relief valve has a lever handle on top with a drain pipe attached to it. The pressure relief valve is most often on the side of the water tank toward the top. Newer models of hot water heaters have the pressure relief valve on top of the water tank.

  • Inspect the area around the pressure relief valve for signs of leaking water. If there is leaking water near the relief valve connection, replace the relief valve. If no leaking is evident, proceed with testing the pressure valve.

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    Examine the area below the pressure relief valve drain pipe. Most water heater closets either have a drain in the floor below the pipe or the pipe is inserted into another pipe to direct the water out of the home. If the end of your drain pipe is not in another pipe or there is no drain in the floor, place a bucket under the drain pipe to catch water when you test the pressure relief valve.

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    Pull the lever handle on the top of the pressure relief valve up with your fingers. A working lever will lift up without difficulty.You should begin to hear water going through the drain pipe. Slowly release the lever to shut off the pressure relief valve. The pressure relief valve is good. If you did not hear water running through the drain pipe, lower the lever on the pressure relief valve and replace the valve. If the lever is difficult to raise, do not force the lever. Replace the pressure relief valve.


  • Now with all that said if you have a closed loop water supply system and you have a pressure vessal/expantion tank it may have gone bad and is making the TP valve leak. you can call your water provider to see if you have closed loop system.

    Feb 04, 2011 | Whirlpool Water Heaters

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    Hi wanting to know is it dangerous to keep filling the preshireb up & is it dangerous to do this when the radiators warning up,.... had a bit of drips on the raditor pipes just bled them'' :)...


    Are you saying the 3/4 inch valve is dripping and you need to keep topping up the water to maintain the pressure?

    If you do this it is "safe" but you will introduce more oxygen in the system with the fresh water.

    This oxygen will corrode the radiators and possiblty the boiler heat exchanger depending on how much water you are introducing.

    Change the Pressure reflief valve. This is a £10/$ 10 part and will save your system in the long run.

    Dec 20, 2010 | Watts 3/4 Pressure Relief Valve

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    Turned off the hot water to fix a leaking tap. now the tap has no hot or cold water and the hot water tank valve is leaking?


    It sounds like two problems.
    Problem 1) Clog inside faucet or clog inside pipes at faucet
    Remove supply tubes leading to faucet and see if problem is inside pipes or inside faucet.
    My bet is clog inside faucet.

    If you have galvanized pipe that meets copper pipe, this can be trouble spot.
    Article on clogged water pipes at Inspectapedia:
    http://www.inspectapedia.com/water/Water_Pipe_Clog_Repair_Guide.htm

    Article on clogged pipes:
    http://www.waterheaterrescue.com/pages/WHRpages/English/Troubleshooting/Tanklets/backflushing.html

    Problem 2) Water heater leak ... you say tank valve is leaking? Is that cold-water shut-off valve? Or tank drain valve? Or TP valve?

    If cold water shut-off is leaking, then replace shut off.

    If tank drain valve is leaking, then check if plastic valve is cracked. If drain valve is cracked, then replace with a brass valve from Home Depot. If plastic valve breaks off, then use hammer and screwdriver to gently chip out the broken plastic valve. New valve threads need teflon tape to seal pipe. If valve is just dripping, then put garden-hose cap over end of valve and screw down tight.

    If TP valve is leaking, then replace with same temperature and pressure rating.
    New TP valve threads need teflon tape to seal pipe.

    Problem 3) If pressure is low all over house:
    Buy pressure gauge at hardware store that screws onto hose connection.

    Test pressure on outdoor spigot.
    Open faucet and check if pressure drops. This says if problem is inside pipes that enter house.

    Test pressure on water heater drain valve.
    This says if pressure problem is before -or- after water heater.

    If problem is before the water heater, then shut-off valve located on cold water line is suspect.
    If problem is after water heater, it could be in hot water outflow pipe on top of water heater, or a nearby elbow.

    Remove hot water line leading from water heater and check pressure. This says if problem is where hot water leaves tank.
    Read articles above about clogs inside water lines.


    Nov 16, 2010 | Rheem Water Heater Pressure Relief Valve

    1 Answer

    I have a alpha cd32 boiler,and i keep having to top the water up within the boiler,so to get hot water and heating again.i have checked for water leaks and nothing is found,however i did check the outlet...


    Pressure relief valve - replace
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    Mar 07, 2010 | Watts 3/4 Pressure Relief Valve

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    Water heater keeping running


    Check releif valve and make sure it is not running out of it. Sounds like the releif valve may be bad.

    It's on the side of the water heater with a lever on it they are for safety reasons, they go bad from time to time. It may be piped through floor to a drain or outsude.

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    I have a propane hot water tank that in discharging the hot water out the relief valve (Champion energy saver series)


    possible problems not knowing age of unit the
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    t-stat not opening gas valve sticking partially open
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    the temp control gas valve or high limit are supposed to shut unit done long before the safety limit of releif valve is reached

    Dec 11, 2009 | Water Heaters

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