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10-07-2021, 06:55 PM
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#1
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Junior Member
Join Date: Oct 2021
Posts: 3
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2017 Isata 3 no bypass on the water heater
Can someone please explain to me how to bypass the hot water heater. I attached a picture. just purchased the motorhome live in michigan will need to winterize it soon.
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10-07-2021, 07:02 PM
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#2
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Junior Member
Join Date: Oct 2021
Posts: 3
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2017 Isata 3 no bypass on the water heater
Threads Merged. - Bama
Can someone please explain to me how to bypass the Truma water heater. I have attached a picture showing the connections.
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10-07-2021, 07:05 PM
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#3
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Member
Join Date: Jun 2020
Location: Indianapolis, IN
Posts: 82
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Based on this picture, I don't believe that you can. You need a third valve available to perform a by-pass.
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10-07-2021, 07:10 PM
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#4
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Member
Join Date: Jun 2020
Location: Indianapolis, IN
Posts: 82
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I responded to your other message.
I can't really tell, is this a tankless water heater ( on demand ) ? I have one on my 2019 I3 and it did have three valves and could be bypassed.
If this is a tank type, you can still winterize. Simply close the valves ( levers not parallel to the lines ), and drain the water heater from the front.
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10-07-2021, 07:30 PM
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#5
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Senior Member
Join Date: Dec 2017
Posts: 212
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10-07-2021, 07:45 PM
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#6
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Senior Member
Join Date: Jan 2019
Posts: 482
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It's pretty easy once you get it. There are video tutorials for winterizing if it's the same on demand system as in my 2019.
__________________
Rich & Karen
West Michigan
Isata 3 24FW
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10-07-2021, 07:49 PM
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#7
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Junior Member
Join Date: Oct 2021
Posts: 3
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water lines
I'm talking about the water line and blowing them out with compressed air. I want to only blowout the line hot and cold should have a bypass. If I shut both values nothing will go to the hot side?
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10-07-2021, 08:05 PM
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#8
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Member
Join Date: Jun 2020
Location: Indianapolis, IN
Posts: 82
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Fair point. So if it is a tank type water heater, just drain it out and then leave the valves open. Use the compressed air like you said. You won't over pressurize the tank as the hot water side of the faucets will be open. In fact, if you open your low point drains, most of the water simply flows out that way via gravity. Dean
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10-08-2021, 07:04 AM
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#9
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Senior Member
Join Date: Aug 2017
Location: Marysville, Ohio
Posts: 1,768
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Quote:
Originally Posted by Dutcher57
I'm talking about the water line and blowing them out with compressed air. I want to only blowout the line hot and cold should have a bypass. If I shut both values nothing will go to the hot side?
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Correct, shut both valves and that will by-pass the Truma.
__________________
 2008 Dynaquest 340xl
Bill and Carol
Retired mechanic
US Army Veteran 🇺🇸
Previous coach 2017 Isata 3RW
Also,3 Diesel pushers, 1Bvan, 2 class Cs
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10-08-2021, 07:07 AM
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#10
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Senior Member
Join Date: Aug 2017
Location: Marysville, Ohio
Posts: 1,768
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Quote:
Originally Posted by DBM
Based on this picture, I don't believe that you can. You need a third valve available to perform a by-pass.
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Don’t listen to this person. Close the two valves in the picture and the Truma is by-passed.
__________________
2008 Dynaquest 340xl
Bill and Carol
Retired mechanic
US Army Veteran 🇺🇸
Previous coach 2017 Isata 3RW
Also,3 Diesel pushers, 1Bvan, 2 class Cs
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10-08-2021, 07:39 AM
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#11
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Member
Join Date: Jun 2020
Location: Indianapolis, IN
Posts: 82
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Quote:
Originally Posted by Bill Davis
Don’t listen to this person. Close the two valves in the picture and the Truma is by-passed.
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Thank you Bill - I now agree. Someday we will all be as enlightened as you. That person.
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10-08-2021, 08:06 AM
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#12
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Senior Member
Join Date: Aug 2017
Location: Marysville, Ohio
Posts: 1,768
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Quote:
Originally Posted by DBM
Thank you Bill - I now agree. Someday we will all be as enlightened as you. That person.
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Sorry. Should of had a cup of coffee before responding.
__________________
2008 Dynaquest 340xl
Bill and Carol
Retired mechanic
US Army Veteran 🇺🇸
Previous coach 2017 Isata 3RW
Also,3 Diesel pushers, 1Bvan, 2 class Cs
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10-08-2021, 09:33 PM
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#13
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Senior Member
Join Date: Nov 2018
Location: Dayton, OH
Posts: 109
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Quote:
Originally Posted by Dutcher57
Can someone please explain to me how to bypass the hot water heater. I attached a picture. just purchased the motorhome live in michigan will need to winterize it soon.
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This is the way my I3 was plumbed too and by closing both of these valves it will bypass the Truma as others have stated, but there isn't anyway to put antifreeze into the hot water lines if you want to do that as well. I had to add a crossover line between the cold and hot water lines with a valve on it to be able to put antifreeze in the hot water lines and bypass the Truma.
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