Avast ATO w/ peristaltic pump, and Avast "Barrel tender" (to keep the ATO container filled).
I haven't had to touch/maintain any part of it over the 4yrs+ it's been in place. I have to say I was surprised how much I appreciate the Barrel tender...it takes one more maintenance item off the list, which is nice when traveling for work. All in all "not cheap" but has been 100% reliable.
Prior I used SmartATO and really wanted to like it (small, cheap, simple), but it had 2 "deal killer" problems (alarm would go off and required resetting the unit every week or so & failed wetside sensor). It wouldn't surprise me if the alarm issue was directly related to the cracked sensor...never replaced the sensor to determine if that would have resolved the alarm issue.
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