Bests & Worsts Reviews from Amazon

We purchased one of these and put beside our water heater and furnace, which has a small condensate collection tank and pump. We tested it when we first bought it and it seemed pretty good; about like a smoke detector in volume, etc. The first time it alarmed was when we were on vacation and the battery had apparently gone nearly dead. We were alerted by our son when he checked the house that it was going off, but no water was leaking, so we had him remove the battery. About a year later, the unit was making a faint scratchy pulsating buzz, so I replaced the battery again. I tested the unit after replacing the battery and found it made the same nearly silent scratchy buzz. I thumped the unit once and it made an alarm sound for a few seconds and then went back to a nearly silent scratching sound. That is all it does now so after nearly 2 years, the integrated circuit components apparently die and you have to pitch it out. Don't be fooled into thinking that it is standing guard as a silent sentry for you. Test this unit out periodically to make sure that the alarm circuit is still functional because it does die after a 18-24 months. See other reviews to confirm.