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Reverse Delay Valve

Apply a constant vacuum of 10 in. Hg to colored end on delay valve. Attach a vacuum gauge (using a 24 INCH section of vacuum hose) to white end of valve. Count time in seconds for vacuum gauge to read 8 in. Hg with a constant vacuum of 10 in. Hg applied to colored end of valve. Compare times with those in table. If incorrect, replace valve.

Reverse Delay Valve Flow Test

Color Minimum Time in Seconds Maximum
White/Gray 0.6 1.6
White/Brown 1.0 3.0
White/Gold 0.6 2.3
White/Red 13.0 15.0
White/Purple 0.3 1.0