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[brewercm]

I have used the kent float (non electrical) for years without a problem, I feed mine off of my RO unit directly to it. The key is to set the float valve so the water inlet is above the water level so no algae grows on it. Not to mention the fresh water being forced through keeps salt creep off. The only time it did malfunction was my own fault for leaving the pumps power cable resting on top of the float.

How many times has your toilet tank overflowed because the mechanical float went bad?

[brewercm]

BTW, I've had two different electrical types go bad and flood my tank with fresh water. Just my .02

[JimD]

Just like anything else,
the electrical float switches need regular maintenance and or replacement every so often I replace mine every year, at 6 bucks a pop, its a wise investment. Ive never had an issue in all the years Ive used electronic float switches.

[TAXMAN]

I didnt have the nice float flitch. I had the small plastic type that was like a little enclosed barrel with holes in the sides. It had to be submerged in the water to work. Maybe the other types shaped like tubes are better. I'm going to be getting the infra red type this time.