3/4 inch PVC Schedule 40 Union with O-Ring Plastic x Plastic

3/4 inch PVC Schedule 40 Union with O-Ring – Precision-Fit for Serviceable Connections

The 3/4 inch PVC Schedule 40 Union with O-Ring is engineered to enable easy disassembly of piping sections in non-pressurized and pressurized systems. This union provides a reliable, watertight seal using a rubber O-ring and threaded collar, simplifying future maintenance, inspection, or component replacement.

Designed for cold water distribution and compatible with Schedule 40 PVC piping systems, this union facilitates clean separations without compromising system integrity. Its precision-molded structure ensures alignment and proper sealing under rated working pressures.

Key Advantages for System Assembly and Maintenance

• ✅ Reusable Assembly Threaded connection with O-ring seal allows for repeated disconnections without degradation of the joint.
• ✅ Service Access Ideal for isolation of valves, filters, or instrumentation without cutting pipe.
• ✅ Material Compatibility Manufactured from Schedule 40 PVC for chemical resistance and long-term durability.
• ✅ Sealing Integrity EPDM or Buna-N O-ring ensures leak protection within the union body under proper torque.

Technical Specifications

• Nominal Size: 3/4 inch
• Material: PVC (Polyvinyl Chloride), Schedule 40
• Seal: O-ring, typically EPDM (verify per spec)
• Connection Type: Socket x Socket with union nut
• Pressure Rating: Up to 150 PSI @ 73°F (non-shock, varies by manufacturer)
• Compliance: Typically meets ASTM D2466 and NSF 61 standards

Installation Considerations

This union should be installed using approved PVC solvent cement and primer on the socket ends, following standard curing times. Proper O-ring placement and nut torque are critical to ensure a pressure-tight seal. Avoid overtightening to prevent thread deformation or seal compromise.

Common Applications

Used in irrigation systems, industrial fluid handling, residential water lines, and equipment tie-ins, the 3/4 inch PVC union allows for clean disconnection where permanent joints are impractical. It is often installed at pump outlets, filter housings, and manifold terminations.

System Design Note

Unions should be placed strategically to enable modular serviceability and should not be used as load-bearing joints. Support adjacent piping to prevent lateral stress on the fitting.

The 3/4 inch PVC Schedule 40 Union with O-Ring is a field-tested solution for achieving reliable, serviceable joins in a variety of piping environments requiring flexibility and precision.