Waterway Plastics Union Fitting, 1-1/2 in Socket To Socket

Waterway Plastics Union Fitting

Waterway Plastics is a trusted name in pool and spa components. The part number 400-4000 describes a Union Fitting that connects two 1-1/2 in socket ends. This fitting is used to join sections of piping in a pool or spa system, allowing disassembly for service without replacing entire runs. It is designed for professional installations and reliable piping connections.

Key Features

• Socket-to-socket union connection for 1-1/2 in piping
• Simple, purpose-built design supports quick assembly and disassembly during maintenance
• Maintains alignment and seal between connected pipe runs in the circulation loop
• Works with standard Waterway socket fittings in common return lines, skimmer assemblies, and pump outlets
• Supports reliable, serviceable piping connections in typical filter housings and return lines

Where This Part Is Used

In typical pool and spa circulation layouts, this union connects two 1-1/2 in pipe runs. It is commonly found where piping meets skimmer assemblies and jet bodies. You’ll see it at pump wet-end connections and along return lines. It also appears near filter housings where service access is needed. The design supports modular service by allowing quick separation of piping sections without removing adjacent components.

Why Choose Waterway Plastics

Waterway Plastics has a long history of engineering consistency across its pool and spa components. The company emphasizes standardized interfaces and reliable sealing across union fittings, delivering predictable performance for service technicians. The durable construction and consistent dimensional tolerances support long-term serviceability in busy pool and spa environments. Choosing Waterway Plastics means relying on a brand with a history of field-tested parts designed for easy replacement and maintenance.