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The TAPCO 738109-0070A is a replacement flush valve designed for American Standard one-piece toilet applications. The flush valve controls the release of water from the tank into the bowl during each flush cycle, making it a core component of toilet tank assembly. Licensed plumbers and experienced service technicians typically handle this replacement as part of a toilet repair or refurbishment. This part is a direct OEM-style fit intended to restore proper flush function and water seal integrity in compatible one-piece toilet configurations.
This flush valve is suited for residential toilet repair applications, specifically one-piece toilet designs where the tank and bowl are manufactured as a single unit. One-piece toilets require flush valve components matched to their specific tank geometry and outlet dimensions. This part addresses common failure symptoms including continuous running water, incomplete flush cycles, and water leakage past the valve seat.
Designed as an OEM-style replacement flush valve for American Standard one-piece toilet configurations. Verify tank model number before installation to confirm fitment.
Flush valve replacement should be performed by a licensed plumber or qualified service technician in accordance with local plumbing codes, including applicable IPC guidelines. Shut off the water supply to the toilet at the angle stop valve and fully flush and drain the tank before beginning disassembly. Disconnect the water supply line before removing the existing flush valve. Do not overtighten the tank mounting hardware or locknut, as cracking the tank is a common installation error on one-piece units.
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