Kayalu Question: Information about the Mildont® 504A mildew restrictor valve, including information regarding compatibility with various 4" drain strainers.

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Mildont® 504A for 4" Drain Strainers

The Mildont® 504A is compatible with drain strainers having two perimeter bolts or screws.

The Mildont® 504A has two widened screw holes which allow for screw-to-screw distances ranging from 2 5/8 to 3 1/2 inches.