UNION HALF ADAPTER 3IN

The Hayward “Union Half Adapter 3‑in” is a plumbing fitting used in pool and spa systems to create a secure, detachable connection between a filter (or pump) housing and the plumbing lines. Essentially it provides one “half” of a union — the portion that mates with another half — allowing the system to be disassembled later for maintenance, inspection, or replacement without needing to cut glued‑pipe joints. The 2‑inch size reflects the internal or nominal pipe diameter that the adapter is designed to fit. Because it’s a “union” rather than a fixed coupling, it helps ensure leak‑free, pressure‑tight plumbing while also giving flexibility for easy disassembly, which is especially useful when servicing or replacing major components like filters or pumps. The construction is meant to resist pool/spa chemicals, water exposure, and normal operational stresses, making it a durable and reliable choice for modular pool plumbing systems.