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Old 10-08-2010, 10:56 AM   #1
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Join Date: Jun 2010
Location: Kingston, Ontario
Posts: 277
Winterizing Shamrock 19' hybrid

I still have one camping weekend left with our hybrid but last night I was installing the Pump Convertor Winterizer Kit. Very slick install BTW. No tools required.

My question is about the hot water tank cut off valves. My previous trailer had an on/off valve between the hot & cold lines to open up flow for the antifreeze to travel. It also had a on/off valve for the cold (in) line to the hot water heater and the hot (out) line as well to keep the antifreeze from filling up the hot water tank.

I notice that my Shamrock has the valve between the hot & cold lines and a valve on the cold (in) line to the hot water heater but doesn't have a valve on the hot (out) line.

Is this normal or did FR forget the valve on the hot water line?


Nights camped
2007 Shamrock F19 hybrid - 2010 (22 nights), 2011 (24 nights), 2012 (11 nights)
2013 Surveyor Select 235RKS -
2012 (6 nights), 2013 (32 nights), 2014 (26 nights), 2015 (37 nights), 2016 (14 nights)
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Old 10-08-2010, 11:05 AM   #2
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Join Date: Aug 2008
Location: Enumclaw, WA
Posts: 2,617
What you have is a bypass valve which diverts the cold water inlet to the hot water outlet tube behind the water heater. There is no need for individual valves on the in and out on water heaters as there should always be a check valve on the hot (output) of the water heater which keeps water from backflowing into the hot water tank from the hot water line.
"I can fix it, and if I can't fix it, I can fix it so no one can fix it!"
Ed & Wendy
2009 Georgetown 378TS | 1998 Jeep Wrangler | 1998 Skeeter ZX202C
Nights camped in 2009: 53 | Nights camped in 2010: 55
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