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How to tell a Hot San Marco 1/4 turn valve from the Cold San Marco 1/4 turn valve

Its very simple to distinguish between the Hot and the Cold San Marco 1/4 turn valves:   The Hot Valve has a nick on every side of the nut whereas the Cold valve doesn’t.   More importantly though, Valves open clockwise and anticlockwise.   To open a Cold Valve you turn the Splines (at the […]

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