Fluidmaster 540AK/AKR 3 Inch Flush Valve Kit

Product Description

The FLUIDMASTER 540AK/AKR is a 3-inch flush valve repair kit designed to stop toilet leaks and restore proper flush performance in residential toilets. The flush valve features an adjustable height so it can fit a wider range of toilet tank configurations. The included 3-inch flapper is also adjustable, allowing the installer to control water volume per flush and dial in performance for the specific tank. This kit ships complete with an adjustable flush valve, a 3-inch flapper, a tank-to-bowl gasket, bolts, washers, and nuts, eliminating the need to source individual components for a full repair.

This kit is suited for residential toilet repair applications where the existing 3-inch flush valve has failed, is leaking, or is causing a running toilet. The adjustable valve height makes it compatible with a broader range of toilet models and tank depths than fixed-height alternatives. The 540AKR variant is specifically designed to fit most common 3-inch flush valve configurations. Plumbers and experienced DIYers use this kit as a complete drop-in repair solution without requiring tank replacement.

Key Features

• 3-inch flush valve size fits common residential tank toilets
• Adjustable valve height accommodates multiple toilet tank sizes and configurations
• Adjustable 3-inch flapper allows fine-tuning of water volume per flush
• Complete kit includes flush valve, flapper, gasket, bolts, washers, and nuts
• Designed to stop leaks and reduce water waste caused by a worn or failed flush valve

Compatibility

The 540AKR fits most common 3-inch flush valve applications in residential toilets. Specific compatible model numbers were not provided in the product data; verify valve seat diameter and tank depth before installation.

Installation Notes

This part is typically installed by a licensed plumber or experienced DIYer familiar with toilet tank components. Shut off the water supply to the toilet and flush to drain the tank fully before beginning work. Follow local plumbing code requirements, which may reference IPC standards, for toilet repair and component replacement. Do not overtighten tank bolts, as cracking the porcelain tank is a common installation error.