Flush-valve vacuum-breaker repair parts are components for replacing the vented sleeve that stops backflow to prevent contamination of the water supply. Vacuum breakers sit below the diaphragm assembly of a flush valve (flushometer) to keep water from flowing backwards through the valve during flushing. They typically need repair or replacement when they allow leaks through the vent holes.,Toilet flush-valve repair parts and accessories allow individual components of a commercial flush valve (flushometer) to be replaced rather than the entire valve assembly. They're used for routine maintenance and repair of tankless-toilet flush valves, which are commonly found in high-use (more than 30 flushes per day) public, commercial, and institutional restrooms. Signs that a flushometer may need repair include leaking from the valve, water splashing from the bowl during flushing, and toilets that keep running. These toilet flush parts are designed specifically for flush valves and often fit only specific brands or models.