Fernco Inc P33U-205 Reducing Size Donut 3x2 in

Product Description

The FERNCO INC P33U-205 is a reducing size donut gasket designed to create a leak-resistant transition between a 3-inch cast iron hub and a 2-inch Schedule 40 plastic pipe. Made for drain, waste, and vent (DWV) applications, this fitting accommodates the common scenario where an existing cast iron stack or hub must accept a smaller-diameter plastic branch line. Licensed plumbers and experienced pipefitters rely on this type of donut gasket to maintain a watertight joint without cutting into the existing cast iron infrastructure. The flexible design compresses to fill the annular space between the two pipe sizes, providing a secure mechanical seal.

This reducing donut is suited for residential and light commercial plumbing systems where cast iron drain lines interface with Schedule 40 PVC or ABS plastic pipe. Typical installations include stack replacements, fixture rough-ins, and retrofit repairs where a smaller plastic branch must tie into an older cast iron hub. The P33U-205 fits a 3-inch cast iron hub receiving a 2-inch plastic pipe, making it a go-to component for partial cast iron to plastic conversion work.

Key Features

• Reduces a 3-inch cast iron hub to accept a 2-inch Schedule 40 plastic pipe
• Flexible donut profile fills the annular gap for a compression-fit seal
• Compatible with PVC and ABS Schedule 40 plastic pipe
• Eliminates the need for mechanical couplings or additional adapters in standard hub-to-pipe transitions
• Sold in a package quantity of 20 units per package

Compatibility

Designed for use with 3-inch cast iron hub fittings transitioning to 2-inch Schedule 40 plastic pipe in DWV systems.

Installation Notes

Installation is performed by licensed plumbers working on DWV drain systems. Before servicing any drain line, shut off water supply to affected fixtures and ensure the line is clear of flow. Insert the donut gasket fully into the cast iron hub before inserting the plastic pipe, and confirm the gasket seats evenly around the full circumference without folding or gaps. Local plumbing codes, including the IPC, should be referenced for approved joining methods in the jurisdiction where the work is performed.

Technical Specifications

• Inlet Size: 3 inches
• Outlet Size: 2 inches
• Application: Cast iron to Schedule 40 plastic transition
• Package Quantity: 20 EA
• Weight: 18 pounds

Standard Information

• Brand: FERNCO INC
• Manufacturer Part Number: P33U-205