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1/2" Bottom Entry Fill Valve – Part 3 cistern ball valve designed for WC toilet tanks. High & Low Pressure Compatible – Performs reliably across a wide range of system pressures. Durable Plastic Construction – Strong Part 3 design with long-lasting, corrosion-resistant materials. Universal Compatibility – Fits most bottom-entry toilet cisterns as a direct replacement. Smooth Refill Operation – Provides efficient and consistent refilling after every flush.