Features include a stainless steel screen to keep boiler crud off the seat and a replaceable Teflon disc that makes the seal. This disc is easily and quickly replaced should the valve develop a leak after long service. The actuating stem is sealed with a Teflon “O” ring. ¼” female pipe connections at both inlet and outlet. 2-9/32” between inlet and outlet and 3-3/8” high. Installation instructions and suggestions included.