Clockwise open one: Turning clockwise for tap on, turning anti-clockwise for tap off. Usually used on the left hand side for hot water tap. Anti-clockwise open one: Turning anti-clockwise for tap on, turning clockwise for tap off. Usually used on the right hand side for cold water tap. 1/2" 20 spline ceramic cartridges. PREMIUM QUALITY with metal reinforced silicone gaskets and the hardest ceramic available.
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