3/4 inch CPVC Union Plastic x Female

3/4 Inch CPVC Union – Socket x Female Thread

The 3/4 inch CPVC union (Socket x FNPT) is designed for joining CPVC piping systems to components or assemblies with female National Pipe Thread (NPT) connections. This fitting facilitates easy disassembly and reassembly of serviceable connections in hot and cold water systems where routine maintenance or isolation is required.

Material and Construction Details

Manufactured from chlorinated polyvinyl chloride (CPVC), this union offers enhanced temperature resistance and durability compared to standard PVC. It is suitable for pressure-rated water distribution systems and is commonly installed in applications requiring chemical resistance and thermal stability. Key characteristics include:

• ✅ CPVC Resin Composition – Formulated to ASTM D1784 Cell Classification 23447-B or better, providing impact resistance and long-term pressure performance.
• ✅ Thermal Capability – Rated for continuous service temperatures up to 200°F (93°C), ideal for domestic hot water distribution.
• ✅ Socket x FNPT Connection – Solvent-weld socket on one end and precision-molded female NPT threads on the other for transition to metal or plastic threaded fittings.
• ✅ O-Ring Seal – Includes an elastomeric seal to maintain joint integrity under temperature and pressure fluctuations.

Installation Requirements

Socket end should be joined using CPVC solvent cement and primer in accordance with ASTM D2846. Apply thread sealant or PTFE tape on the male NPT connection to ensure leak resistance. Tighten the union nut securely by hand, then use an appropriate strap wrench if necessary—avoid overtightening. Confirm system compatibility before installation in chemical or high-pressure applications.

Typical Use Cases

This union is often specified in potable water systems, recirculating hot water loops, equipment tie-ins (e.g., water heaters or filtration units), and piping networks requiring future disconnection. Common in residential, commercial, and institutional settings where corrosion resistance and serviceability are key priorities.

Technical Specifications

• Nominal Size: 3/4 inch
• Material: CPVC (Chlorinated Polyvinyl Chloride)
• End Connections: Socket x Female NPT
• Seal Type: EPDM or Buna-N O-ring (check system chemical compatibility)
• Compliance: NSF/ANSI 61, NSF/ANSI 14, Lead-Free compliant (NSF 372)

Regulatory Note

All CPVC potable water fittings must meet applicable health and safety standards for lead content and pressure performance. This union is certified for use in systems governed by IPC, UPC, and NSF regulations.

The 3/4 Inch CPVC Union – Socket x Female Thread delivers durable, code-compliant performance in hot and cold water piping systems. Designed for efficient system transitions and maintenance access, it offers a reliable solution for contractors working in serviceable or modular piping applications.