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Old 10-06-2014, 08:48 AM   #1
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Bypass Valves

Our 2009 Lexington 300SS GTS does not have any water heater bypass valves. How would you winterize without these valves.
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Old 10-12-2014, 03:35 AM   #2
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I was faced with that situation on a unit I owned in the past. Although not familiar with your particular units layout and how easy it is to access your water heater back side... You can do an air pressure dry winterize, I'm a bit old school and even though I use the pressure technique I still want antifreeze in my pipes, but you don't want to fill that tank with antifreeze.

You can buy a water heater bypass kit to install or piece build a bypass with valves or disconnect the supply and out lines of the heater and connect them together with a couple of fittings and a hose. Then just do the normal winterize.

If you intend to keep the unit for any length of time, you won't regret putting a bypass kit on it for future ease of use.

There are many good Utube videos explaining all of the above and as long as you can access the back of the water heater, it's not a hard fix. If you are still nervous about it, any RV service tech can quickly do the bypass install for you.

Hope this helps!
Carolina Cowboy
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Old 10-12-2014, 08:21 AM   #3
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You really only have 2 choices if you stick with anti-freeze. Either buy 8 or so gal of anti-freeze so you fill the water heater while you're winterizing or install the bi-pass kit. A 3rd option is blowing out the lines, which I'm not a big fan, as you may be putting stress on your water lines and I don't like the fact that I wouldn't be sure all the water was out of the system.
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Old 10-18-2014, 11:06 PM   #4
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I go with the 3rd option and have never had any issues. Just make sure you relieve pressure before draining the heater. Blow all lines out with 40psi, takes about half hour opening and closing valves. Don't forget the outside shower hose. Than put antifreeze in each sink drain, shower drain and in toilet. Make sure you clean out water filter under bed and had drained lower point hoses under Lex. Good luck
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Old 10-24-2014, 10:51 PM   #5
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I wonder what percentage of lexingtons do not have the bypass on water heater?


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Old 10-24-2014, 11:51 PM   #6
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One thing that was not mentioned was how cold does it get where you are and after looking at your profile I would say get a bypass put in, then blow lines out with air compressor then add antifreeze to seal the deal. Air alone won't get into the pump and air will bypass some water in low points and by putting antifreeze in also makes sure things are safe. As to getting antifreeze in water heater my understanding was that the antifreeze can damage the anode and the electric element in the heater.
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Old 10-25-2014, 09:25 AM   #7
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I found our bypass under sink in hall, removed two screws and the cover, and there it is.Click image for larger version

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Old 10-25-2014, 12:27 PM   #8
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Didn't want to hi-jack this thread, but I found the hidden by-pass on my Lexi 283ts. Started a seperate post.
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Old 12-26-2014, 08:42 AM   #9
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I just got a 2006 Lexington GTS, I previously owned a 2001 Reflection (there's a piece of work)
Anyway finally found the bypass thanks to HAM123 photo. My question is , does anyone know what the valve in a water line under the bed is for?
Thanks
drron
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Old 12-26-2014, 06:38 PM   #10
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Could it be a winterizing kit?Click image for larger version

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