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The LAVELLE INDUSTRIES 400A ANTI- is a heavy duty toilet flapper designed for reliable sealing performance in residential toilet flush valve assemblies. Flappers serve as the primary water control component inside the toilet tank, opening to allow the flush cycle and sealing the flush valve seat to stop flow when the tank refills. This unit is built for demanding use and is intended for installation by plumbers and experienced service technicians who require a durable, drop-in replacement flapper.
This flapper is suited for residential toilet tank applications where the standard flapper has worn, warped, or failed to seat correctly, resulting in phantom flushing or continuous tank refill cycles. It is cross-referenced under model designations FLUPRO53 and C04015, making it a recognized replacement across multiple product lines. Plumbers and facility maintenance professionals will find this a straightforward tank repair component.
Cross-referenced with FLUPRO53 and C04015 designations. Designed as an OEM-style replacement flapper for residential toilet flush valve assemblies where these reference numbers apply.
Installation is performed by a licensed plumber or qualified service technician. Before replacing the flapper, shut off the toilet supply stop valve and flush the tank to drain standing water. Unhook the old flapper from the overflow tube ears and disconnect the chain from the flush handle arm before installing the new unit. Verify the flapper seats flat against the flush valve opening with no kinks in the chain before restoring water supply.
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