I have a Mini Lite 2502KS. I am not sure what the position of a valve on the inlet side of the fresh water pump should be in when winterizing with antifreeze. I have attached pictures of the valve in normal position.
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2016 Open Range Light 297RLS Fifth Wheel
2015 GMC 2500HD 6.6L Duramax
I have a 2109s and to pull antifreeze I have to turn the valve to the left. The handle should be aligned with the white hose to the left in your photo.