winterizing 34RSBS issue

[sgmflick]

I have a question, when I winterize my 34RSBS I use air and blow out all lines. Than I pump antifreeze through the system. The problem I had this year is antifreeze ran out through the city water hookup. Any suggestions what may have caused that to happen?

[wraenking]

How much are you pumping into the system. I always just blow the lines out with air and pour some fluid just in the traps and tanks.

[Grumpy]

Sounds like the check valve is stuck open or the cone screen is reversed.(pointing in)

[wraenking]

Good call Grumpy. Not sure why I didn't think of that!

[sgmflick]

ok, thanks but where would I find the check valve and cone screen?