Reducer Coupling, Slip x Slip PVC Schedule 80 1-1/4" x 1" (829-168)

The 829-168 is a PVC Schedule 80 reducer coupling that provides a clean one-step transition from a 1-1/4" pipe run down to a 1" pipe run using solvent-weld slip ends on both sides. The 1-1/4" to 1" reduction is one of the most frequently specified inline diameter changes in commercial and industrial piping systems, appearing wherever a distribution main steps down to a branch, sub-header, or equipment supply connection.

Schedule 80's thicker wall profile delivers measurably higher pressure ratings and stronger mechanical performance than Schedule 40 across all sizes — a meaningful advantage in systems that experience elevated operating pressures, hydraulic surge, or thermal cycling. The slip (socket) end configuration requires no threading or thread sealant; a properly solvent-cemented joint becomes a permanent, monolithic connection with pressure integrity that meets or exceeds the pipe wall itself.

Manufactured from rigid PVC Type I, Grade I (Cell Classification 12454), the 829-168 resists degradation from a wide spectrum of corrosive media including acids, bases, salts, oxidizing agents, and many industrial solvents. NSF/ANSI 61 certification confirms the fitting is suitable for contact with potable water, extending its applicability beyond purely industrial contexts into water treatment, municipal, and commercial plumbing installations.

As with all reducing fittings, the smaller end — 1" in this case — governs the pressure rating for the assembly. System designers should account for this when specifying the 829-168 in circuits where the full 1-1/4" pressure rating of an upstream fitting or pipe segment is expected.

Specifications:

Industries & Applications:

• Industrial & Chemical Processing — One-step diameter transitions between process headers and branch lines or equipment inlets carrying corrosive fluids where metal fittings are unsuitable
• Water Treatment & Distribution — NSF 61 listing supports use in potable water systems; 1-1/4" to 1" step-downs are common at filter housings, manifold branches, and metered service connections
• Irrigation & Agricultural Systems — Reducing main supply lines to 1" lateral runs, zone valves, or sub-header assemblies in large-scale field and greenhouse irrigation layouts
• Commercial & Mechanical Plumbing — Inline transitions in cold water service, recirculating systems, and equipment supply lines within commercial construction and tenant fit-out projects
• HVAC & Chilled Water Systems — Diameter reductions in PVC-piped cooling water, chemical treatment feed lines, or condensate management systems
• Pool, Spa & Aquaculture — Corrosion-free inline reductions in chlorinated, saline, or chemically treated recirculating water systems