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Old 03-28-2013, 06:29 PM   #1
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Water Heater

We recently and suddenly lost our hot water. We have good pressure on the cold side but nothing on the hot side. I pulled the anode and flushed the tank, but still no water. Anybody ever had a similar problem?
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Old 03-28-2013, 06:31 PM   #2
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Is your outside faucet open by chance ?
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Old 03-28-2013, 06:35 PM   #3
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No, I checked. I have cold water but no hot. Is there a check valve on the hot side?
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Old 03-28-2013, 06:37 PM   #4
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There are typically check valves on the inlet and outlet connections on the back of the water heater. If a bit of crud from the tank gets lodged in the valve, it can be held shut. Take them off, clean them off (sometimes soaking in vinegar helps) and reinstall. Or, remove and replace with new ones.

Clifftall's idea of the outside shower having valves open can also cause a mixing of water and loss of hot water flow.
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Old 03-28-2013, 06:38 PM   #5
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Yes there's is. What brand / model do you have ?
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Old 03-28-2013, 08:14 PM   #6
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2004 40 foot Front door Alpine Coach
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Old 03-28-2013, 09:04 PM   #7
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2004 40 foot Front door Alpine Coach
Nice, but what make of the water heater?
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Old 03-28-2013, 09:27 PM   #8
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Red face

JD, this problem is very typically caused by the check valve located on the top rear of the water heater. If you pull the check valve you'll probably find the inner plastic plunger, metal spring, and plastic retainer laying there loose. And, many folks (like me) have simply left the parts out and re-installed the check valve (or outer brass shell). If you need to winterize with anti-freeze (as opposed to blowing out the water system with air) you may want to replace the check valve with a new one. Otherwise, you don't need it. Good luck!
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Old 03-28-2013, 11:08 PM   #9
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Thanks, I'll see if I can get the part and replace the valve tomorrow.
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Old 03-29-2013, 04:50 AM   #10
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OP said he removed the anode to check... If it has an anode it has to be a Suburban since they use steel tanks. Atwoods are aluminum and don't use an anode.
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Nice, but what make of the water heater?
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Old 03-29-2013, 04:53 AM   #11
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Quote:
Originally Posted by JDVandenBerg View Post
Thanks, I'll see if I can get the part and replace the valve tomorrow.
Please update us when you can.
Cliff
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Old 03-29-2013, 05:29 PM   #12
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BCBowers, I finished the project and we're back in service. I was unable to locate a new check valve, but with some expert advice from a service manager, a plumber, and you, I reinstalled my old valve minus the innards. The plumber I contacted told me they have the same problem with installation of new domestic water heaters. After 5 years, the check valve, which is built into the unit, malfunctions. Because of that, their fix is to remove the plunger from the valve. The RV Service Manger has been in the business for thirty years and recalls the days when units did not have check valves. Thanks again.
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Old 03-29-2013, 05:34 PM   #13
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Good deal. Thanks for the update.
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