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Old 12-29-2019, 08:30 PM   #1
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water heater bypass location 2020 Thor 29M

Hello All,

First time post here. My mother in law bought a new 29M motorcoach and has asked me to winterize it for her, since I've had travel trailers and such. I've looked all over this thing and cannot find the bypass the water heater. I found the pump under the rear couch cushion and have checked under the sink in the bathroom, the cabinet in the bedroom and around the general vicinity of the hot water heater. No bypasses. Any suggestions?
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Old 12-29-2019, 08:47 PM   #2
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It's on the backside of the water heater - probably have to remove a panel to get to it. Lotsa 29M owners here that can chime in. I seem to remember a panel in the bedroom closet?
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Old 12-29-2019, 11:51 PM   #3
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Originally Posted by 16ACE27 View Post
It's on the backside of the water heater - probably have to remove a panel to get to it. Lotsa 29M owners here that can chime in. I seem to remember a panel in the bedroom closet?


My 2018 29M water heater bypass valves are under the kitchen sink.
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Old 12-29-2019, 11:56 PM   #4
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Originally Posted by Az Ernie View Post
My 2018 29M water heater bypass valves are under the kitchen sink.
Do you have to remove a panel to access them? I've checked there and dont see anything.
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Old 12-30-2019, 12:39 AM   #5
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Originally Posted by tntcooper1 View Post
Do you have to remove a panel to access them? I've checked there and dont see anything.


I have a 2018.

I donít have to remove the panel but the three valves are way up and under the sink. At least one is covered by the panel but I can reach them all.
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Old 12-30-2019, 01:22 AM   #6
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If you see a panel with #2 square drive heads remove it!
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Old 12-30-2019, 02:17 AM   #7
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Originally Posted by tntcooper1 View Post
Do you have to remove a panel to access them? I've checked there and dont see anything.


You can see the valves without removing a panel. Just hard to reach.
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Old 12-30-2019, 06:30 PM   #8
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Found it!! After looking behind every panel and cabinet, access to the hot water heater was underneath the master bed. The valves were right there with the tank. Thank everyone! Maybe this will help someone else.
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Old 12-30-2019, 09:56 PM   #9
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Originally Posted by tntcooper1 View Post
Found it!! After looking behind every panel and cabinet, access to the hot water heater was underneath the master bed. The valves were right there with the tank. Thank everyone! Maybe this will help someone else.


Wow. Thatís a major location change from th 2018ís.
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Old 01-01-2020, 04:12 PM   #10
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Model: Hurricane 29M
State: Michigan
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THOR #17235
I just saw your post, glad you were able to locate the bypass valves. We have a 2020 29M also. We bought it in November so the dealer winterized ours for us before we took it. I watched the tech go through the process so I am familiar with it. For your information, as I was going over the coach after we got it home I discovered there was a macerator pump under the sink in the outside kitchen. This pumps the drain water UP into the gray tank. The tech apparently did not know this because all he did was pour some anti-freeze into the sink but did not pump it through the system. After looking over the plumbing under the sink I saw that you need to run that pump long enough to fill the 1-1/2" PVC drain line with antifreeze to protect it. It looks like it could hold a couple of quarts of water/antifreeze.
BTW, the pump switch is located under the cabinet.
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Old 01-04-2020, 09:23 PM   #11
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yes it under the sink behind the hot water tank and you might have to remove a panel to get to the turn off
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