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Old 11-11-2018, 09:03 PM   #1
Junior Member
Brand: Thor Motor Coach
State: Missouri
Posts: 7
THOR #12958
Tankless winterizing

I have a tankless water heater. Is it ok to run antifreeze through it? I see where you shouldn’t with a tank.

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Old 11-11-2018, 09:53 PM   #2
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Brand: Thor Motor Coach
Model: Palazzo 33.3 34'bunkhouse
State: Alabama
Posts: 2,063
THOR #4735
You probably should, as the copper coils where the heating is happening within the system certainly will hold water unless you have 'blown' out your lines, at least those connected to this water heater.

I'm not sure regular water heaters 'can't' accept the pink stuff, but since they are 'holding tanks', it's probably not a good idea since it will try to 'fill' the tank.

the Turners
'14 Palazzo 33.3 bunkhouse 34' diesel
KingTailgater2 Dish HD, 100w/5a SOLAR, BlueOx
100,000+mi since '14 - US, Alaska, Canada.... formerly Georgia, then NorthCarolina, now Alabama : )
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Old 11-11-2018, 10:54 PM   #3
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Brand: Thor Motor Coach
Model: Axis 24.1
State: Michigan
Posts: 8,484
THOR #1150
Yeah one of the reasons for the bypass for a tanked water heater is just so you don't have to buy 6 gallons of antifreeze.
2014 Thor Axis 24.1
2018 Chevy Bolt
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