Fluidmaster Universal Toilet Repair Kit 2" PerforMAX Flapper - 400A Fill Valve, Adjustable 9–14"

Fluidmaster 400AKRP10 is a complete universal toilet repair kit that replaces the fill valve, 2" PerforMAX flapper, flush valve, handle, and gasket to restore reliable flushing and reduce leaks.

This all-in-one kit bundles Fluidmaster’s proven 400A fill valve with a PerforMAX adjustable 2-inch flapper plus the necessary flush valve parts and tank-to-bowl gasket, giving you the components to fix most common tank issues. The universal design fits the majority of 2-inch flush-valve toilets and is intended for use with 1.6 to 3.5 gallons-per-flush systems and larger. It’s engineered for straightforward DIY installation so you can replace worn parts quickly without special tools.

How does this kit improve a weak or noisy fill?

The included 400A fill valve is designed to quiet refills and regulate water level accurately. It’s height-adjustable to match different tank geometries and helps prevent continuous running caused by improper fill height or degraded seals.

• Adjustable height from 9 to 14 inches to fit common tanks
• Quiet operation reduces refill noise
• Factory-tested components to stop overfilling and running

Will the PerforMAX flapper save water without sacrificing flush power?

The PerforMAX 2-inch flapper is water-saving and adjustable, letting you fine-tune how much water releases per flush. It seals reliably to prevent slow leaks while optimizing the amount of water used with each flush.

• Adjustable settings to balance water use and flush performance
• Designed to seat firmly and prevent continuous leakage
• Compatible with standard 2-inch flush valve openings

Is installation truly DIY-friendly and what parts are included?

The kit is packaged for fast, tool-light installation—many users complete it in under 10 minutes. Everything needed to replace the common failing tank parts is included, so you won’t need separate purchases to restore normal operation.

• Complete 400A fill valve assembly (adjustable height)
• PerforMAX 2" adjustable flapper and replacement flush valve
• Tank-to-bowl gasket, replacement handle, and mounting hardware

Will this kit fit my toilet model?

The Fluidmaster 400AKRP10 is built to be universal for most 2-inch flush-valve toilets. It works best with toilets rated 1.6 to 3.5 gallons-per-flush or larger, and the height-adjustable fill valve accounts for many tank sizes and layouts.

• Designed for 2-inch flush valves commonly found in modern toilets
• Fill valve adjusts from 9"–14" to accommodate tank heights
• Universal components target the most frequent repair needs

Who is this for: Homeowners, landlords, and maintenance technicians who want a single, trusted kit to replace worn tank components and stop leaks, running toilets, and inefficient flushing. If you’re troubleshooting noisy refills, phantom leaks, or weak flushes in a standard 2-inch flush-valve toilet, this Fluidmaster kit offers a proven set of parts that make replacement straightforward and reliable.