Hydrostatic Relief Valve - Bronze - 1.5 Inch Threaded pool-dimensions_16x30 The double-taper allows the whole

The double-taper allows the whole board to arc while flexing

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It makes disassembly easier than a one-piece flange

Hydrostatic Relief Valve - Bronze - 1.5 Inch Threaded pool-dimensions_16x30 The double-taper allows the wholeThis is a 1 1 2 inch threaded Bronze Hydrostatic Relief Valve with stainless steel spring. This spring loaded relief valve is made of corrosion resistant bronze and fits 1 1 2 inch threaded pipe. Seal is neoprene. Replacing your hydrostatic relief valve after you drain your pool is highly recommended.