Reduced Coupling, Socket PVC Schedule 80 1-1/4" x 1/2" (829-166)

The 829-166 is a PVC Schedule 80 reducing socket coupling that transitions a 1-1/4" pipe run down to a 1/2" pipe run using solvent-weld socket ends on both sides. The two-step reduction this fitting provides is commonly needed when stepping from a main supply or distribution line down to a smaller branch, instrument connection, or point-of-use service line.

Schedule 80's heavier wall section means higher pressure ratings and superior resistance to mechanical stress compared to Schedule 40 — critical advantages in industrial environments where fittings may be subject to vibration, thermal cycling, or aggressive chemical exposure. The socket (slip) end design creates a permanent, leak-free joint when installed with the appropriate IPS solvent cement, eliminating the thread engagement and sealing concerns associated with threaded connections.

Molded from rigid PVC Type I, Grade I material (Cell Classification 12454), the 829-166 resists corrosion from a broad range of acids, bases, salts, and industrial chemicals. Its NSF/ANSI 61 certification confirms suitability for potable water contact, widening its application range from strictly industrial settings into water treatment, commercial plumbing, and irrigation infrastructure.

The 1/2" outlet end governs the pressure rating for the assembly, so system designers should size accordingly when specifying this fitting in high-pressure circuits.

Specifications:

Industries & Applications:

• Industrial & Chemical Processing — Reducing main process lines to instrument ports, sample taps, chemical injection points, or small-bore branch connections where corrosion resistance is non-negotiable
• Water Treatment & Purification — NSF 61 listing supports potable water applications; two-step reductions are common in filter housings, metering lines, and distribution manifolds
• Irrigation & Agricultural Systems — Transitioning from larger supply headers to 1/2" lateral or drip lines in field and greenhouse irrigation layouts
• Commercial & Mechanical Plumbing — Inline diameter step-down for cold water service, equipment supply, or low-flow branch circuits within larger plumbing assemblies
• Laboratory & Analytical Systems — Reducing supply lines to precision instrument connections or small-bore tubing tie-ins in process control and analytical environments
• Pool, Spa & Aquaculture — Reliable performance in chlorinated and chemically treated water systems where metal fittings corrode over time