The Xylem-Bell & Gossett 110192LF, also known as the FB-38, is a fast fill valve designed to quickly fill hydronic heating systems, cooling systems, and other plumbing applications with water or other compatible liquids. Made of durable brass, this 1/2 inch valve features a pressure regulator pre-set to 12 psi, but adjustable from 10 to 25 psi, ensuring safe operation within your syst...