The Spears 858 Series Schedule 80 CPVC FKM Union with Female Pipe Threads (FPT x FPT) is engineered for reliable, serviceable connections in demanding industrial and commercial piping systems. Designed for easy disassembly and maintenance, this union features a chemically resistant FKM (Viton®) O-ring seal, making it ideal for aggressive fluids, corrosive chemicals, and high-temperature applications.