Bsc Preferred 4378 Wax Extender Kit Toilet Gasket

Product Description

The BSC PREFERRED 4378 is a wax extender kit designed for toilet installations where the floor flange sits 1 to 1.25 inches below the finished floor surface or where problem areas require extra wax for a reliable seal. The kit contains two urethane wax toilet gaskets — one standard and one with a polyethylene horn flange — along with a 3.5-inch brass bolt kit. The urethane wax formulation creates a gas-tight, odor-tight, and water-tight seal between the toilet base and the floor flange. Licensed plumbers install this component as part of a toilet rough-in or reset on both residential and light commercial projects.

This kit is suited for installations involving 3-inch or 4-inch waste lines where the floor flange elevation falls below standard height after tile, hardwood, or other finish flooring has been added. It is ready to use straight from the package with no additional materials required for the wax seal itself. The included polyethylene horn gasket extends down into the drain line to improve alignment and reduce the risk of channeling or bypass at the wax interface.

Key Features

• Fits 3-inch and 4-inch waste lines for broad compatibility across standard residential and commercial drain configurations
• Addresses low flange conditions from 1 inch to 1.25 inches below finished floor surface
• Includes one urethane wax gasket and one urethane wax gasket with polyethylene horn flange
• Includes 3.5-inch brass bolt kit for complete toilet anchor hardware
• Forms a gas-tight, odor-tight, and water-tight seal
• Ready to use — no prep or conditioning required before installation

Compatibility

Designed as an OEM-style replacement and new-installation wax seal solution for standard toilet closet flanges on 3-inch and 4-inch drain waste lines where the flange is recessed below finished floor level.

Installation Notes

This component is typically installed by a licensed plumber during a toilet set or reset. Shut off the water supply and flush the tank before removing the existing toilet. Ensure the closet flange is secure and undamaged before seating the new wax gasket. Press the toilet straight down onto the wax seal without rocking or repositioning once contact is made, as repositioning will compromise the seal. Follow local plumbing code requirements, including applicable IPC standards, for toilet rough-in and flange height specifications.