Oatey K835-9 Adjustable Flush Valve Flapper Kit

Product Description

The OATEY K835-9 is an adjustable flush valve and flapper assembly designed for residential two-piece toilets with a 2-inch flush valve opening. The kit includes a 3-inch oversized flapper, a gasket, and tank-to-bowl bolts, providing the hardware needed for a complete flush valve service. The no-cut overflow tube adjusts from 8.5 inches to 13 inches to fit a range of tank heights without modification. Designed to restore flushing power and stop running water caused by a worn or leaking flapper, this kit is a standard repair item for licensed plumbers and skilled DIYers performing toilet maintenance.

This kit is suited for routine toilet repair in residential settings. The 3-inch oversized flapper increases water flow during the flush cycle compared to a standard 2-inch flapper, improving bowl clearing performance. The adjustable overflow tube eliminates the need to cut the tube to length, reducing installation time. The included gasket and tank-to-bowl bolts make it a self-contained repair solution when servicing a standard two-piece toilet with a 2-inch flush valve seat.

Key Features

• Fits most two-piece toilets with a 2-inch flush valve opening
• 3-inch oversized flapper for improved flushing power
• No-cut overflow tube adjusts from 8.5 inches to 13 inches
• Includes gasket and tank-to-bowl bolts for a complete repair
• Grey and green color-coded components for easy identification during install

Compatibility

Designed as an OEM-style replacement for most two-piece toilets with a standard 2-inch flush valve opening.

Installation Notes

Installation is typically performed by a licensed plumber or experienced DIYer. Shut off the water supply at the angle stop valve and flush the tank to drain before beginning work. Remove all standing water from the tank before disconnecting the tank-to-bowl bolts. Work must comply with applicable local plumbing codes, which generally reference the International Plumbing Code (IPC).