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Old 10-13-2018, 12:21 PM   #1
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Looking for hot water low point

I have 2017 gt 31r, been all under RV looking for hot water lp.
Have found fresh tank overflow . Have to blue lp outlets, assume one is fresh tank lp and other is cold lp. In last class c it had a red and blue lp drains. Seems our walk thru tech said fr combined hot and cold lp drains. Seems strange but I am no expert on rvís.
Rick
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Old 10-13-2018, 02:52 PM   #2
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When you bypass the water heater the cold and hot water lines are one system and the one low point drain is for both. You must bypass the water heater or water will stay in the hot water lines.
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Old 10-13-2018, 06:25 PM   #3
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Thanks sgtlm17 for reply, guess my class piping layout required separate low points, not really worried, will let dealer winterize this first year in gt
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Old 10-14-2018, 10:29 PM   #4
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I have the same unit and had the same questions last year, but bypassed water heater used the one blue drain and all came out fine.
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Old 10-15-2018, 07:18 PM   #5
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Could the hot water heater drain port be considered the low point?
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Old 10-16-2018, 09:07 AM   #6
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We should be using the water heater isolation valves, so that should not be it. As stated earlier, only one drain found on these coaches
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Old 10-16-2018, 10:28 AM   #7
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I use the bypass valves after I drain the system. It makes draining the hw heater a lot faster. Then I do the bypass before adding antifreeze.
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Old 10-16-2018, 10:59 AM   #8
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Quote:
Originally Posted by markb422 View Post
I use the bypass valves after I drain the system. It makes draining the hw heater a lot faster. Then I do the bypass before adding antifreeze.
It's actually recommended to drain the water heater first. There can be some sediment in there that you really don't want clogging up your lines.
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Old 10-16-2018, 12:12 PM   #9
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It's actually recommended to drain the water heater first. There can be some sediment in there that you really don't want clogging up your lines.
That is where I start. Open the hw drain and a couple faucets inside and the water comes pouring out. After the hw tank drains down I open the low point drains.
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