Originally Posted by Anne Marie
My camper does not have the hot water bypass and the manual clear states it will require at least 10 gallons of antifreeze to winterize. I have used at least 12 gallons so far and the problem is when I turn the pump on nothing comes out of the hot water taps at all. I have read the forums and have yet to find my answer.
Let me expand on something in my previous post. By 2004, most of the water heater bypasses were single valve. My '99 Sunline had an older two valve style bypass.
This file gives all the info needed to understand bypasses. I wrote it and placed it in the files area six years ago, exactly for inquiries like this. It includes a picture of the back side of the heater in my T-2453 and the valves are very plainly visible. If yours is a single valve bypass, the upper valve is replaced by a brass check valve and the lower valve can be either white plastic like mine or brass.
Sunline Coach Owner's Club - Sunline Owner's Files - Hot Water Heater Bypass Information
In your 2004 T-2499, the water heater is on the street side, and almost certainly under the galley sink. It is possible that it is under the couch, but you will have to look to be sure. Where ever it is on the outside, it's in the same place on the inside. All water heaters are installed in RV's so that the back side is accessible to the owner or service tech primarily so that you can reach the winterizing bypass valve and service the heater if necessary.
'12 F250 4x4 Super Duty PowerStroke 6.7 diesel
2011 to present: '11 Cougar 326MKS
1999 to 2011: '99 Sunline T-2453
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