Originally Posted by ewbldavis
I'm not clear on how you "let in" a "little antifreeze" into the water heater. How do you know how much you let in unless you drain it? If you drain then what's the point?
I'm not worried about the water heater, but the line going from wet bay to water heater. I ran pump with antifreeze like 10 seconds, then flipped valve to "bypass". Maybe not a super scientific method, but worth a shot and I saw a little pink at WH drain.
I use low points and compressor before filling with antifreeze. For $3/gal. it's cheap insurance in case I didn't get it all out. Regardless of your methods, sad time when we shut them down for 6 months!