Fernco Inc P44U-305 Cast Iron Hub Donut 4x3

Product Description

The FERNCO INC P44U-305 is a cast iron hub donut designed to transition between two common drain pipe materials in a single, code-friendly connection. It connects 4-inch service weight soil cast iron pipe at the hub end to the plain end of 3-inch PVC Schedule 40 plastic pipe. This fitting is used in drain, waste, and vent applications where an existing cast iron system ties into a PVC replacement or extension. Licensed plumbers and experienced pipefitters handle this type of transition regularly during retrofit and remodel work.

This hub donut suits residential and light commercial plumbing applications where a cast iron drain stack or branch line meets a PVC continuation. It is especially common during partial pipe replacements, where the original cast iron hub is intact and a new PVC run is being added. The unit-of-measure is each, and the package quantity is 20 units per case, making it practical for contractors stocking inventory for multi-unit or phased projects.

Key Features

• Transitions 4-inch service weight soil cast iron hub to 3-inch PVC Schedule 40 plain end
• Designed for drain, waste, and vent system applications
• Sold individually with a case pack quantity of 20 units
• Compact donut profile fits within standard hub clearances

Compatibility

Designed for use with 4-inch service weight soil cast iron pipe at the hub connection and the plain end of 3-inch PVC Schedule 40 plastic pipe, as specified by the manufacturer.

Installation Notes

Installation should be performed by a licensed plumber in accordance with the International Plumbing Code (IPC) and applicable local codes. Shut off water supply and ensure the drain system is depressurized before beginning work. Clean both the cast iron hub interior and the PVC pipe end thoroughly before seating the donut to ensure a proper seal. Do not force or over-drive the fitting into the hub, as this can damage the sealing surface.

Technical Specifications

• Inlet Size: 4 inches (cast iron hub)
• Outlet Size: 3 inches (PVC Schedule 40 plain end)
• Pipe Material Compatibility: Service weight soil cast iron to PVC Schedule 40
• Package Quantity: 20 units per case
• Weight: 23 pounds

Standard Information

• Brand: FERNCO INC
• Manufacturer Part Number: P44U-305