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The one in my ATO has been going since they first came out.You might want to rethink the PMUP; they have been notorious for failure (IME). I've had three and they did not last long at all. YMMV. The little Tunze pump has been suggested as an alternative, but I have not tried it yet. I chose to use a Kamoer for my ATO instead.
BRS PMUP Reviews