Sioux Chief sc-490-10666 Tank to Bowl Gasket Sponge

Product Description

The SIOUX CHIEF sc-490-10666 is a close-couple tank-to-bowl gasket designed to seal the connection between a toilet tank and bowl in residential toilet installations. Constructed from sponge material, this gasket compresses under bolt load to create a watertight seal that prevents leaks at the tank base. It measures 2.125 inches inner diameter, 3.25 inches outer diameter, and 1.1875 inches thick. Part of the Sioux Chief Series 490 line, it is a domestic-made component suited for plumbers and service techs replacing failed or deteriorated gaskets during toilet repair or tank replacement work.

This gasket is intended for close-couple toilet configurations where the tank mounts directly to the bowl. It is appropriate for residential bathroom plumbing service and is a common replacement item during toilet rebuilds, wax ring service calls, or any job requiring tank removal. The sponge construction allows it to conform to minor surface irregularities, maintaining a consistent seal under normal tank bolt torque.

Key Features

• Sponge material conforms under compression for a consistent, leak-free seal
• 2.125 inches ID x 3.25 inches OD x 1.1875 inches thick for close-couple fitment
• Part of the Series 490 gasket line
• Domestic manufacture

Compatibility

Designed as an OEM-style replacement tank-to-bowl gasket for close-couple residential toilet configurations.

Installation Notes

Installation is performed by a licensed plumber or qualified service technician. Shut off the water supply at the stop valve and flush the tank fully before removing the tank. Seat the gasket squarely over the flush valve outlet before setting the tank onto the bowl, and tighten tank bolts evenly and gradually to avoid cracking the vitreous china. Follow applicable IPC guidelines for fixture connections.

Technical Specifications

• Series: 490
• Gasket Type: Close Couple Tank To Bowl
• Material: Sponge
• Inner Diameter: 2.125 inches
• Outer Diameter: 3.25 inches
• Thickness: 1.1875 inches
• Country of Origin: Domestic

Standard Information

• Brand: SIOUX CHIEF
• Manufacturer Part Number: sc-490-10666