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10-13-2022, 10:29 PM
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#1
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Senior Member
Brand: Thor Motor Coach
Model: Four Winds 31W
State: Texas
Posts: 335
THOR #22781
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Winterizing 2021 Four Winds class C w/tankless hot water heater
Can anyone point me in the right direction to learn how to winterize with antifreeze?
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10-13-2022, 10:55 PM
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#2
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Senior Member
Brand: Thor Motor Coach
Model: Axis 24.1
State: Connecticut
Posts: 1,790
THOR #20289
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You do not need to bypass a tankless water heater. Just suck in RV antifreeze until all fixtures, hot and cold, run pink.
David
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10-13-2022, 10:59 PM
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#3
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Senior Member
Brand: Thor Motor Coach
Model: Four Winds 31W
State: Texas
Posts: 335
THOR #22781
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Thanks appreciate your input.
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10-17-2022, 07:54 PM
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#4
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Junior Member
Brand: Thor Motor Coach
State: New York
Posts: 15
THOR #24248
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To be safe, I then go and turn the hot water heater off afterwards so it can't unintentionally cycle.
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10-17-2022, 09:17 PM
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#5
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Senior Member
Brand: Thor Motor Coach
Model: Axis 24.1
State: Connecticut
Posts: 1,790
THOR #20289
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Quote:
Originally Posted by M3olsen
To be safe, I then go and turn the hot water heater off afterwards so it can't unintentionally cycle.
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And you turn the Gerard tankless HW heater off with a switch inside the outside cover. Turning off the battery switch will also work, but not if shore power is connected.
David
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10-17-2022, 09:25 PM
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#6
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Junior Member
Brand: Thor Motor Coach
State: New York
Posts: 15
THOR #24248
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Quote:
Originally Posted by DavidEM
And you turn the Gerard tankless HW heater off with a switch inside the outside cover. Turning off the battery switch will also work, but not if shore power is connected.
David
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Exactly - thank you for clarifying.
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10-17-2022, 10:47 PM
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#7
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Senior Member
Brand: Thor Motor Coach
Model: Four Winds 31W
State: Texas
Posts: 335
THOR #22781
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Thanks...
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10-17-2022, 10:58 PM
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#8
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Senior Member
Brand: Thor Motor Coach
Model: 2020 Magnitude SV34
State: Florida
Posts: 4,148
THOR #12751
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Just an FYI....
Thor should not have installed a hot water tank bypass with the tankless system as they do on the coaches with an actual hot water tank.
I know of one case where Thor did put a water heater bypass on a Girard. The dealer winterized their coach like they would a regular hot water tank. They enabled the bypass so water was not blown out of the water tank lines with air and / or RV anti-freeze was not run through the Girard. As a result the copper lines in the Girard burst over the winter. The dealer or Thor would not cover it even through they both royally screwed up... that is just pitiful.
Just make sure you don't have the bypass installed and if you do, don't use it!!!!
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10-18-2022, 12:09 AM
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#9
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Senior Member
Brand: Thor Motor Coach
Model: Axis 24.1
State: Connecticut
Posts: 1,790
THOR #20289
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Quote:
Originally Posted by Judge
Just an FYI....
Thor should not have installed a hot water tank bypass with the tankless system as they do on the coaches with an actual hot water tank.
I know of one case where Thor did put a water heater bypass on a Girard. The dealer winterized their coach like they would a regular hot water tank. They enabled the bypass so water was not blown out of the water tank lines with air and / or RV anti-freeze was not run through the Girard. As a result the copper lines in the Girard burst over the winter. The dealer or Thor would not cover it even through they both royally screwed up... that is just pitiful.
Just make sure you don't have the bypass installed and if you do, don't use it!!!!
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My 2021 Thor Axis with a Girard tankless WH had bypass valves installed. Since I bought the unit in the middle of the winter the valves were on bypass. Took me a bit of digging next spring before I discovered what was happening. Fortunately, the blocked in WH lines didn't freeze up and burst as above.
David
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10-18-2022, 12:07 PM
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#10
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Senior Member
Brand: Thor Motor Coach
Model: Four Winds 31W
State: Texas
Posts: 335
THOR #22781
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Very good information, will check it out. Unfortunate that dealer/Thor didn't take responsibility.
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10-23-2022, 04:16 PM
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#11
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Senior Member
Brand: Thor Motor Coach
Model: Windsport 29m
State: North Carolina
Posts: 524
THOR #9553
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Quote:
Originally Posted by JimEasTexas
Can anyone point me in the right direction to learn how to winterize with antifreeze?
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I got a plug to screw into my city water inlet with an air fitting and use my compressor to blow out all the water in my 2018 Thor Windsport. It 's better and cheaper than using that nasty RV antifreeze and no rinse required!!!!
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10-24-2022, 06:39 PM
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#12
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Senior Member
Brand: Thor Motor Coach
Model: Four Winds 31W
State: Texas
Posts: 335
THOR #22781
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Thanks...
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10-24-2022, 06:46 PM
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#13
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Senior Member
Brand: Thor Motor Coach
Model: Freedom Traveller A27
State: North Carolina
Posts: 2,437
THOR #17765
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I do same as knucklehead. Set air compressor to 50psi. Open valves in kitchen, bathroom, toilet, outside shower. Been doing this for 17 years.
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10-24-2022, 06:59 PM
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#14
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Senior Member
Brand: Thor Motor Coach
Model: Four Winds 31W
State: Texas
Posts: 335
THOR #22781
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Thanks
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10-24-2022, 08:01 PM
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#15
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Senior Member
Brand: Thor Motor Coach
Model: Four Winds 23U
State: Nevada
Posts: 250
THOR #27334
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Quote:
Originally Posted by Jimbo56
I do same as knucklehead. Set air compressor to 50psi. Open valves in kitchen, bathroom, toilet, outside shower. Been doing this for 17 years.
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Same here.
In addition, I pour some RV antifreeze in all drains that have a trap (shower, sinks) to make sure they don't freeze up. Typically run enough in so that some ends up in the holding tanks to deal with any residual water.
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2020 Four Winds 23U.. ex rental unit
2014 Jeep Wrangler 2dr Manual Trans toad
2019 Beta 500-RRS, for when the going gets nasty
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10-24-2022, 08:04 PM
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#16
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Senior Member
Brand: Thor Motor Coach
Model: Four Winds 31W
State: Texas
Posts: 335
THOR #22781
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Good...
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