The Rheem RTG20151P Concentric Vertical Termination is engineered for 3 in./5 in. venting systems, providing a reliable solution for gas appliances. This termination kit is designed to ensure safe and efficient exhaust of combustion gases while allowing fresh air intake. Constructed from high-quality materials, it complies with ANSI standards for safety and performance. Its compact design facilitates easy installation in tight spaces, making it ideal for residential and commercial applications. This product is compatible with various Rheem models, ensuring a perfect fit for your heating system.