The Rubber Spring Check Plunger for cartridges with spring checks, 3/17 in, is a precision replacement component designed to maintain proper check valve and cartridge performance. Featuring a durable rubber seat and spring-loaded mechanism, it ensures effective sealing and reliable one-way flow control. This plunger helps prevent backflow by automatically closing when pressure drops, supporting system safety and efficiency. Engineered for compatibility with spring check cartridges, it provides a secure fit and consistent operation. Built with corrosion-resistant materials, it is ideal for plumbing, commercial faucet systems, and fluid control applications requiring dependable performance.