Originally Posted by
zombie
Depends on how much you use it. The tubing lasts roughly 500 gallons before needing to be replaced and the mean time before failure of the dos itself was about 5000 gallons at the highest rate the program would allow (this is likely extended as lower duty cycles usually mean better mtbf on motors). For a 90 gallon tank, this is head replacements every year and the dos itself lasting 8-10 years before needing replacement or service.
You might be an engineer if...You have no life and can prove it mathematically.
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