Gerber Plumbing Fixtures products earn trust through enduring performance and reliability, and replacement parts are no exception. This Gerber flush valve includes a 3 in. flapper designed for fast and reliable flushing. The flapper allows for a quick start to a flush and enhanced drain line carry. It is made from a durable silicone material and includes a non-corroding stainless steel chain. The flush valve features a full-flow overflow tube to minimize the risk of a tank overflowing, providing peace of mind.