CPVC Union — 1 in. Socket — Spears FlameGuard™ — 4257-010
The Spears FlameGuard™ 1-inch CPVC union connects two pieces of CPVC pipe in wet fire sprinkler systems and allows them to be easily separated for service or repair. Constructed from fire-protection-grade CPVC, it provides strong, corrosion-resistant performance. Each socket end is joined with ASTM F493-approved solvent cement to form a tight, permanent seal. The union nut design allows the joint to be disassembled without cutting the pipe, which saves time during maintenance. This fitting is UL Listed and FM Approved for use in NFPA 13, NFPA 13R, and NFPA 13D systems. Rated for 175 psi and up to 150°F, it’s designed for reliable use in residential and light-hazard applications.
During installation, follow Spears FlameGuard™ instructions for proper pipe preparation and cementing. After assembly, the union should be hand-tightened securely but not overtightened to prevent damage to the sealing surfaces. Always check for leaks after system pressurization and use only listed CPVC-compatible materials. This union provides a dependable, reusable, and code-compliant connection point within CPVC wet sprinkler systems, helping ensure long-lasting performance and easy service access.
