Horizontal Modulating Dual Float Valve 3 Inch monitors_PPM/pH They have perforated holes that

They have perforated holes that are 1/2 inch

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Horizontal Modulating Dual Float Valve 3 Inch monitors_PPM/pH They have perforated holes thatThis 3 inch horizontal PVC valve is a float operated valve with throttling capabilities that will cycle as required. Fluidtrol's modulating type float valves are intended for use in aquatic systems where self regulating flow is required. They work to make gradual adjustments to main drain flows based on surge tank water levels. This vertical float valve comes standard with two butyrate float balls and feature polypropylene valve construction with