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Old 01-10-2019, 10:50 PM   #1
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Don't drain your water heater....

...with 25 PSI of air pressure in the lines 😁 Yesterday was sunny and a whopping 50 outside, so I decided to check out the motorhome for any damage done by our sub freezing temps (mid 20's for five hours). First I connected the MH to our water line and checked for leaks, nothing, phew. Then I disconnected the water line and hooked up my air compressor to blow out all the internal lines of water. Did this so that all the lines were blowing air, but knew the hot water tank wouldn't be fully drained. So forgetting that the compressor was still running, I started unscrewing the drain plug. Suddenly, the plug blew out of my fingers and I was deluged with cold water😢. The plug disappeared somewhere into the bushes next to the RV. Duh I thought, still had air pressure. So anyway, a new plug arrives tomorrow but I can rest at ease if the temperature drops knowing that all the lines are cleared of water. Still a small amount in the fresh water tank, gray and black tanks, but I'm not worried about them. We rarely drop below freezing for more than 5 or 6 hours during the winter, so no need to fully winterize.
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Old 01-11-2019, 09:26 AM   #2
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the next time you want to take the plug out of the WH just flip the pressure relief first. that should eliminate any surprises.
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Old 01-11-2019, 12:00 PM   #3
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Good thing the water heater had not been on recently, results would have been different.

I have and use a winterization checklist for good reasons.
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Old 01-12-2019, 06:55 PM   #4
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The drain plugs with a drain cock already in them are pretty nice.
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