Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Reliability problems (twice)

My second Intelliflow in 6 years failed today; the hot water valve stopped opening; Same problem on the first one (except it was the cold valve).When it works, it works great, but as other reviewers have noted, there is no easy way to bypass a failed unit. I spent the morning on a minor plumbing project (sweating a new standard valve onto the pipes) just so I could do a load of laundry.I'm not going to buy a third; I'll probably take some other steps to mitigate water damage risk.