Originally Posted by bikendan
I'd flush the antifreeze out of of the FW tank because it'll leave a strange taste.
There's NO need to put antifreeze in the FW tank.
We have a Sunseeker class C. The fresh water tank is not accessible, under the bed and is gravity filled. The outlet from the tank is on the side of the tank as close to the bottom as possible. The waterline from the tank goes rearward a foot, drops a few inches, then runs maybe 6 feet across to the other side of the motorhome and drops a foot to the water pump. When I winterize, how do I ensure this line does not freeze up? If I put some antifreeze in the FW tank, I could get antifreeze into this line. If I attempted to blow it out, the FW tank would need to be totally empty, and perhaps would I need to insert a new tee in the line just before the pump to avoid fruitlessly trying to blow backwards through the pump?
In summary, I keep hearing not to put AF in the FW tank, but I’m unsure how to protect the line going from the tank to the remotely located pump. Any advice?