Welcome joe1028!
Like I said, some have ones that work, and others don't. I'm glad! that yours does as it's supposed to!
Unfortunately, a LOT of folks don't have your good experience![]()
(note - there is a LOT of extra piping involved in one of these and that can cause additional problems - the pipes are buried and not readily accessible if one breaks- folks who don't have 'deep freeze' winters are more likely to have less problems than those in that have a deeper frost line)
FWIW- I was 'certified on the "Caretaker 99" systems in '91
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