The Rubber Flange Washer (3819) by Union Brass Manufacturing Co is engineered for effective sealing in flange connections. This washer is crafted from premium rubber, ensuring durability and resistance to environmental factors. With precise dimensions, it fits standard flange sizes, making it suitable for a variety of plumbing and HVAC applications. The washer's design promotes a secure seal, preventing leaks and enhancing system efficiency. It complies with industry standards, making it a reliable choice for both professional and DIY projects.