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new water heater doesn't drain even after opening the pressure valve and faucet

new water heater doesn't drain even after opening the pressure valve and faucet

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  #1  
Old 07-07-19, 11:48 AM
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new water heater doesn't drain even after opening the pressure valve and faucet

My new water heater is only 1 month old and it doesn't drain as suggested by the user manual.

My procedure

1. Turn the temperature to the vacation setting
2. Closed the water supply to the tank
3. Attached a hose to the drain valve at the bottom of the tank
4. Turn on a hot water faucet somewhere else in the home, turn on the pressure valve by pushing it up.
5. Opened the drain valve

It doesn't drain.
However, if I open the cold water intake, water comes out clean.

The problem was described in this older thread here. The suggestion was to open the pressure valve. I didn't work for me.
https://www.doityourself.com/forum/w...ing-flush.html
Any suggestion?
 
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  #2  
Old 07-07-19, 02:43 PM
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I usually leave the water supply turned on. That way you don't have to open a faucet to vent and more debris is removed since it has the system water pressure behind it.
 
  #3  
Old 07-07-19, 04:00 PM
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Thanks.

This is what I am doing now.

I am wondering however if there is something wrong with my system since it is not what the manual suggests. Also won't I need to deal with this issue when it is time to replace the water heater?
 
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Old 08-14-19, 12:56 PM
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I don't know if you figured this out, but mine does the same thing. It seems to have a good suction in it and I loosened a fitting in the top to let air in,in my case, the expansion tank, and it drained nicely.
 
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Old 08-17-19, 06:02 PM
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Thanks. I am not sure how to loosen a fitting in the top.

I just found out that if I turn on all the hot water faucets in my house, it will drain but slowly. One of the faucets in the bathtub makes a major difference.
 
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Old 08-18-19, 02:15 PM
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The garden hose needs to be lower than the tank. Many people try to drain a water heater in a basement by connecting a hose and putting it out a window. You can flush a tank with the hose out the window as it's under pressure. You can also pull the release handle on the T&P valve AFTER the water heater has cooled.
 
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Old 08-19-19, 07:32 AM
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@pjmax
Thanks.
Yes, my hose is lower than the tank. And I opened T&P value which didn't seem to help much in my case.
 
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