The 440i HV replaces all previous 440 Timer Assemblies.
Fits on older Autotrol 150,155,160, 163, 168 Valves, and newer 255, 263, and 268 Valves that have 440, 440i, or 460i timers now.
But can not be used as a replacement for a 940 or 960, which only applies to a very few units out there.
Also can replace the 460 NovRam and 460i electronic timers, if you want a simplier analog clock timer and don't required metered demand operation of your Autotrol Valve.
NOTE: Performa 263 and 268 Camshaft Revision information can be found on our BLOG,
Performa Valves Keep Breaking 440i and 460i Timers Quickly
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