Fluidmaster Inc K-540A-015-T5 3 Inch Flush Valve Repair Kit

Product Description

The FLUIDMASTER INC K-540A-015-T5 is a complete toilet flush valve repair kit designed for high efficiency toilets (HET) equipped with a 3 inch flush valve. The kit includes an adjustable flush valve, a 3 inch adjustable flapper, a gasket, a toilet wrench, bolts, washers, and nuts — everything needed to restore proper flush function without separate parts sourcing. The flush valve height adjusts up or down to accommodate varying tank depths, and the flapper adjustment allows fine-tuning of water volume per flush. Plumbers and experienced DIYers install this kit during routine toilet maintenance or when addressing poor flush performance and valve wear.

This repair kit is designed for residential toilet service on high efficiency toilet models with 3 inch flush valves. The adjustable valve height and flapper design make it compatible with a range of tank configurations, reducing the need for model-specific parts inventory. It is well suited for service calls where the existing flush valve or flapper has degraded, causing weak flushes, phantom flushes, or continuous running. The included toilet wrench simplifies removal and reinstallation of the flush valve assembly without additional specialized tooling.

Key Features

• Adjustable flush valve height to fit a range of toilet tank sizes
• 3 inch adjustable flapper for water volume fine-tuning
• Complete kit: flush valve, flapper, gasket, toilet wrench, bolts, washers, and nuts
• Designed specifically for high efficiency toilets (HET) with 3 inch flush valves
• Packaged in a quantity of 5 units per package for service stock

Compatibility

Designed as a universal OEM-style replacement for most common residential high efficiency toilets (HET) with a 3 inch flush valve configuration.

Installation Notes

Installation is performed by a licensed plumber or qualified service technician. Shut off the water supply valve at the base of the toilet and flush to drain the tank before beginning disassembly. Follow all applicable local plumbing codes, including IPC guidelines, when servicing toilet flush valve assemblies. Do not overtighten the flush valve nut; hand-tight plus a firm quarter-turn with the included tool is standard practice to avoid cracking the tank.

Technical Specifications

• Flush Valve Size: 3 inches
• Application: High Efficiency Toilet (HET)
• Package Quantity: 5 units
• Unit of Measure: EA
• Weight: 7.85 pounds

Standard Information

• Brand: FLUIDMASTER INC
• Manufacturer Part Number: K-540A-015-T5