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Water fills tank and does not drain? - Water Heaters

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Probably has calcium build up and needs to be changed or cleaned depending on how it was last cleaned.

Posted on Apr 16, 2014

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Posted on Jan 02, 2017

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How do I drain the water tank


Anon, Make sure gas or breaker(power) is turned off to the Heater so it will not come on during draining,connect a hose onto bottom valve of water heater, run hose to a floor drain and insert, turn your water main off so as not to fill tank while draining, open water heater drain valve, water will then drain from attached hose into floor drain until empty. For water to run faster you may open a near by hot water tap, this will allow air into tank as you drain it, do not forget to turn this tap off before refilling tank. You then can turn main back on for a bit if you would like to do a flush of sediment from the bottom of tank.
See links below for more instruction and video.
"I hope this helped you out, if so let me know by pressing the helpful button. Check out some of my other posts if you need more tips and info."
How to Drain Water Heater Today Homeowner

How to drain water heater

http://www.bobvila.com/articles/how-to-drain-a-water-heater/#.VxqJ6NQrJxA

Apr 22, 2016 | Water Water Heaters

2 Answers

I fill the tank up, but it seems too light to be full, so I drain it and it only has about 1 gallon if that in it. Whats wrong?


How are you filling the tank, and is this in an RV or what? Open pressure relief valve when filling and when water comes out pressure relief valve, you know your close to full. If it doesn't come out there when valve is open, check for by-pass valve(s) in wrong position and not filling the tank.

Aug 11, 2011 | RTO Atwood Water Heater - 6 Gal LP

1 Answer

How do I drain the tank for maintainence?


Turn the gas valve to pilot and leave it there. This way the pilot will stay on but it wont try to heat and you dont have to re light the pilot. Turn off the water supply valve to the heater. Open the drain valve at the bottom of the heater and hold the lever open on the pop off valve towards the top of the tank. This will allow air into the tank and it will drain faster. If there is not a floor drain nearby you can hook a garden hose to the drain valve. When you are finished do not turn the gas valve back on until the heater is full of water. Open sink faucets when filling tank with water to avoid excess pressure.

Jan 30, 2011 | Rheem 40 Gallon FVR NATGAS Low WATER...

1 Answer

This Rheem gas water heater fills with cold water and then drains immediately through the pressure -temperature valve. Would replacing the pressure-temp valve do the trick, or could it be something more?


Provided that there aren't other issues with your heater, changing the t&p may be enough. I say this as they generally do not just fail on their own, but rather, something has caused it to operate. This is either caused by temperature or pressure. Without knowing the age of your heater, it is a bit difficult to advise you as to replace or repair the heater. If you are comfortable that your's has more useful life in it, you can replace the t&p valve. If the expected life of the heater has been reached, you may wish to replace the unit.
To Replace the T&P Valve: Shut off the gas, and close the water inlet valve. Drain the tank down. The best way is to attach a hose to the boiler drain and route it to the outside. This also will help remove silt and sludge that can build up in water heaters, and extend the life of your tank. You will need to take an air bleed to allow the tank to drain. You can do this by lifting the lever on the t&p valve and by opening one of the hot water valves that you heater provides water to. You should hear air being pulled into the heater as the water drains.
There is a tag on your valve. When you remove your t&p valve, take it to the hardware store with you, tag and all. Get an exact replacement, and install according to the directions.
Before you pressure the heater back up, flush water through it through the still open drain. This will stir up and flush out any remaining sediment.
Close the drain, but leave the hot water valve that you opened earlier open, as the tank fills, the air will be expelled down the line. Fill the heater completely, then re-light the heater.
Best regards, --W/D--. Feel free to rate this solution.

Jan 25, 2011 | Rheem Water Heaters

1 Answer

How do I change the heating element on my 50 gallon electric Reliance 501 hot water heater? Where can I get the heating elements?


Buy elements at local hardware store or home center, like Lowes
Look at label on side of tank.
Label shows element wattage.
Element is also printed on end of element in tiny letters-numbers.
Typical elements are 4500 and 5500 watts.
Tank needs 10 gauge wire and 30 amp breaker for 5500 watt element.

Water heaters are fully repairable by homeowner.

1) Have you tested water heater to see if element is problem? You need cheap multi-meter from Home Depot.
http://waterheatertimer.org/How-to-troubleshoot-electric-problems-with-water-heater.html

2) To change element
a) turn off power
b) drain water from drain valve ... once it starts draining, loosen element slightly while tank still has weight to hold against you turning element wrench.
Here's what to do if water heater won't drain:
http://waterheatertimer.org/Water-heater-will-not-drain.html
c) open covers on tank, remove element using element-wrench from hardware store or home center.
If element won't come out:
http://waterheatertimer.org/How-to-remove-old-water-heater-element.html
d) Clean out tank if needed.
e) Replace element.
f) Fill tank entirely with water before turning on power or element will burn out.
g) Once tank is filled, and water flows steady out of tub spout, turn on power.
Each steps above is shown on following link:
http://waterheatertimer.org/How-to-clean-sediment-out-of-electric-water-heater.html

3) You need to buy some things:
Screw-in type (not bolt-in type) Element that matches wattage on tank label. New Element comes with washer.
Inexpensive Element wrench.
Inexpensive multimeter if you are going to test parts first.
Some pieces of pipe and hose if tank sediment needs to be cleaned out.
Washing machine hose if tank will not drain (return after job is done).

4) Also:
You need flat tip and phillips screwdriver.
Lighting to work on tank
Some WD-40 if element is stuck in place.
Garden hose to drain tank.
Shop vac and duct tape if you need to vacuum out sediment.
Tarp to protect floor and carpet
Maybe a knife to cut back insulation on wire if wire is burned at element.

Web links above go through entire process step by step.
Add a comment if you need more help, I'll be back around 5 CST

Nov 30, 2010 | RELIANCE ELECTRIC WATER HEATER

1 Answer

There is water constantly draining through the drain valve.


Grab a cap from the hardware store to stop it on the cheap. If it it is a brass drain valve you may be able to get away with draining the tank and replacing the small washer inside. Replacing the drain valve will be the ultimate solution.
Turn off the power on and electric or shut the gas valve to its off position.
Turn the water supply off above the tank or at the house main.
Connect a garden hose to the drain and open it all the way.
Open the safety valve on the top or side of the water heater to allow air in the tank so it will drain faster.
Unscrew the old drain valve with a pipe wrench.
Wrap plumber's teflon tape clockwise around the threads of the new drain valve and screw it into the tank by hand.
Tighten the valve with your pipe wrench until it is facing down at a 45 degree angle.
Close the safety valve.
Turn the water back on.
Open a faucet or two in the hows to let the air out of the tank while it is filling.
Turn the power or gas back on ONLY after the water heater it filled with water.

Oct 11, 2010 | Rheem 40 GAL ELEC TALL Water Heater 6YR SC...

1 Answer

Empty boiler


Turn main water off to the water heater, it may be a valve on cold side coming in to shut off. Next turn power off to the heater and drain the tank the drain will be located near the bottom of the tank.
You will need a water hose to connect to the drain to run water outside. Open a faucet hot side to allow you to drain the tank.

Upon reinstall connect the tank up and fill tank and open up hot side on one faucet at a time to purge out air from system before turning power back on. Make sure you have water flowing from each faucet's hot side before turning power back on.

Jul 02, 2010 | Rheem 80 GAL ELEC TALL Water Heater 6YR SC...

1 Answer

Im looking for the drain on a vanguard 3wa79 by rheem. i want to change the element but cant figure out how to drain the tank. i have looked all around the bottom of the tank and around the whole unit and...


The drain is a plastic valve, looks like a knob with a hose fitting coming out the middle of it. It should be about 1' above the bottom of the tank enclosure.
Be sure to turn the gas off before you drain the water and fill the tank before you relight it.

Jun 11, 2010 | Vanguard International Vanguard BY Rheem...

1 Answer

40 GALLON WATER HEATER


the hot water tank may be filled with scale buildup on the inside. drain a few gallons out of tank until the water runs clear. it is best to drain out water heater at least 2 times a year.

Jan 09, 2010 | Rheem 40 GAL ELEC TALL Water Heater 6YR SC...

1 Answer

Draining the Priemer Plus Gas Hot Water Heater


Begin by turning off the gas at the tank and at the valve near the tank. CAUTION: Do not proceed any further if you do not know how to relight the gas pilot!
2) Turn off the COLD water supply to the tank.
3) Attach a garden hose to the drain valve at the bottom of the tank. Run the hose to a convenient drain location. Be careful if you use a real cheapy garden hose... some of these become very soft when hot water runs through them, and may leak! If you don't have a drain in the basement floor or suitable sump hole, you have my sympathies... this drain-down can take a while with a bucket! Oh... and be careful if you use a soft plastic bucket. It can also soften from the heated water so don't overfill it or burn yourself!
4) Open up the hot water side of any faucet. Open up the drain valve on the tank and allow it to empty. Miller time. That is, unless you don't have a sump...
NOTE: If the drain valve clogs, turn on the cold water supply to the tank to use water pressure to "blast" through the clog.
5) When the tank is empty, shut off the drain valve and turn on the cold water. This will loosen up more sediment in the tank through the churning action of the cold water in the tank. Let the tank fill partially and drain it again. In fact, if you find that the sediment starts to clog the drain valve, turn on the cold water supply to the tank, which will help loosen the sediment and blast it out.
If you have extreme amounts of sediment, you may have to repeat this procedure a few more times. Look at the drain water... if it is running clear, you are done. Shut off the drain valve, open the cold water supply and allow the tank to fill. Once water comes out of the hot water faucet, the tank is full and your task is done! Now, you can turn the electricity or gas back on to heat the water.
How frequently to clean the sediment from your tank...
This depends on the source and purity of your water supply. Some pros recommend doing it annually, some every few years. I would recommend doing a partial drain down annually if you find any sediment in the tank, otherwise every couple of years.
Remember that with an electric water heater, you must turn the power off! Even a partial drain down may expose the upper heating element to the air and permanently damage it!

Jan 21, 2009 | Water Heaters

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