Spears UN-34 Pvc Union 3/4 Inch Schedule 40 Buna-n

Product Description

The SPEARS UN-34 is a 3/4-inch Schedule 40 PVC union with socket (SOC) end connections and a Buna-N elastomer seal. Unions allow piping sections to be disconnected and reconnected without cutting, making them a standard fitting in systems that require periodic service access. This fitting is suited for water, irrigation, chemical handling, and pool or spa plumbing where a leak-free, removable joint is needed. Licensed plumbers, pool technicians, and pipefitters install these fittings in both new construction and retrofit applications.

The UN-34 is designed for 3/4-inch PVC pipe in Schedule 40 pressure-rated systems. Its socket-style ends are solvent-welded to mating pipe, while the union body separates at a threaded nut to allow disassembly. The Buna-N O-ring seat provides a reliable seal for general water service and many common chemical applications. This fitting is commonly used in residential and light commercial plumbing, pool equipment pads, irrigation manifolds, and industrial process lines where PVC construction is appropriate.

Key Features

• Schedule 40 PVC construction rated for standard pressure service
• Socket (SOC) ends accept solvent cement for a permanent, fused connection to pipe
• Buna-N O-ring seal provides a reliable, leak-resistant joint at the union face
• Union design allows pipe sections to be separated without cutting or disturbing solvent-welded joints
• Fits 3/4-inch PVC pipe — compatible with standard Schedule 40 pipe OD dimensions

Compatibility

Designed as an OEM-style replacement and standard union fitting for 3/4-inch Schedule 40 PVC piping systems. Cross-referenced to part numbers 457-007 and 164-634HC.

Installation Notes

Installation is performed by licensed plumbers or qualified pipefitters following applicable IPC or local plumbing code requirements. Solvent-cement the socket ends to mating pipe using PVC primer and cement rated for Schedule 40 fittings, and allow full cure time before pressurizing the system. Depressurize and drain the line before disassembling the union nut for service. Do not over-torque the union nut by hand — PVC threads are not designed for wrench tightening.

Technical Specifications

• Pipe Size: 3/4 inches
• Schedule: Schedule 40
• Material: PVC
• Connection Type: Socket (SOC) ends with threaded union nut
• Seal Material: Buna-N (NBR) O-ring

Standard Information

• Brand: SPEARS
• Manufacturer Part Number: UN-34