Pasco 5843CP 4" x 3" Cast Iron ProSeal Transition Coupling, Cast Iron to Plastic

Pasco 5843CP 4" x 3" Cast Iron ProSeal Transition Coupling

The Pasco 5843CP ProSeal Coupling is a rough-in transition fitting built to join 4" cast iron pipe to 3" cast iron, plastic, or XH (extra-heavy) cast iron pipe in below-grade and behind-the-wall drain, waste, and vent runs. This coupling gives plumbers and contractors a single, dependable connector for mixed-material DWV transitions where cast iron soil pipe meets plastic (PVC/ABS) branch lines or reduces down to a smaller cast iron section, eliminating the need for multiple adapters on the same joint. Constructed of cast iron for long-term durability under buried and concealed installation conditions, the 5843CP is sized to handle the 4" to 3" reduction commonly encountered in soil stack and branch-line repairs, additions, and new construction rough-in.

Key Features

• Trade Size: Transitions 4" cast iron pipe down to 3" pipe for reduced-diameter branch and stack connections.
• Multi-Material Compatibility: Couples cast iron to cast iron, plastic, or XH (extra-heavy) cast iron pipe, giving a single fitting for mixed-material DWV transitions.
• Durable Construction: Cast iron body for strength and stability in buried or concealed rough-in plumbing applications.
• ProSeal Design: Engineered as a coupling-style connector for joining pipe sections without requiring a full re-fit of the existing line.
• Rough-In Ready: Designed for behind-the-wall and under-floor soil and waste line work, not a finished/decorative fixture.
• Contractor Packaging: Available with a case quantity of 96 EA and an order multiple of 24 EA, suited to stocking trucks and warehouses for repeat rough-in jobs.

Technical Specifications

• Prop 65 Warning: Y
• Product Type: Home Improvement & Commercial Supplies - Plumbing Accessories
• Consumer Package Weight: 0.74 LB
• Quantity: 96 EA
• Minimum Order Quantity: 1 EA
• Order Quantity Multiple: 24 EA

Typical Applications

• Cast Iron Soil Stack Repair and Replacement
• Cast-Iron-to-Plastic DWV Transitions
• Below-Grade and Behind-the-Wall Waste Line Rough-In
• Commercial and Residential Plumbing Renovation
• New Construction Soil and Waste Piping

Why Pasco?

Pasco builds the 5843CP ProSeal Coupling from cast iron to hold up to the demands of buried and concealed DWV rough-in work, giving plumbers a single reliable fitting for 4" to 3" cast iron, plastic, and XH cast iron pipe transitions. For contractors managing mixed-material soil and waste lines, this coupling simplifies the connection without stacking multiple adapters on one joint. Stocked in case quantities of 96 EA with a 24 EA order multiple, it supports trade professionals who need dependable, repeatable rough-in supply for cast iron transition work.