THU224 Toilet Flush Valve/Toilet Replacement Parts 

This THU224 toilet flush valve assembly is designed as a direct replacement for TOTO Aquia two-piece toilets, ensuring seamless compatibility with models including Aquia III, Aquia II, and both old/new-style Aquia toilets. It precisely fits tanks #ST412M, #ST413M, #ST416M, and #ST464M (models CST414M, CST416M, CST464MF, etc.).

THU224 Dual Flush Valve Assembly Features:

• Dual Flush Efficiency: Offers full flush (1.6 GPF) and half flush (0.9 GPF) 
• Material: Constructed with high-grade ABS plastic and reinforced silicone rubber, extend valve lifespan
• Size: Total height 12 3/8″
• Easy To Install: For THU224 systems, replace the upper valve without tank removal. For THU435 or other models, replace the button after tank disassembly
• Compatibility: May work with non-TOTO toilets if tank height and flush valve measurements match. Always verify dimensions before purchase to avoid installation issues

NOTE:

Incorrect sizing can lead to poor flushing or leaks. We prioritize compatibility accuracy to ensure customer satisfaction. Measure your tank and compare specifications carefully!

Toilet Valve Compatibility: Fit for TOTO Replacement Parts for Two Piece Toto Aquia New/Old Style/Aquia III/Aquia II Toilet. Two Piece Model #CST414M - Tank #ST413M/ST416M/ST464M toilet models
Dual Flush Valve Size: This toilet valve is only suitable for split-type toilet, not suitable for one piece toilet,and the water tank height should be greater than 11.81inch. Total dual max flushing system height :12 3/8″
Thu224 Flush Valve Material: This toilet dual flush valve is made of high-quality ABS material and equipped with premium silicone rubber gaskets, reinforced for durability. Designed with full or half flush options, it saves water, restores flushing performance, and extends the service life of the flush valve
Easy Installation: Our flush valve replacement matches the original THU224. For THU224, no need to remove the tank—just replace the upper part. For other models (e.g., THU435), remove the tank and replace the button
This flush valve may work with non-Toto Aquia toilets, but measure tank height & drain opening before purchase to ensure compatibility. Incorrect sizing may cause installation issues or poor flushing. We prioritize customer satisfaction through accurate compatibility