Upgrade your TOTO one-piece wastewater system with the Genuine TOTO THU831-A Drain Valve Assembly. Engineered to replace older models (e.g., THU460.15E-A), this high-efficiency valve delivers smooth, reliable flushing at 1.6 gallons per flush. Designed specifically for TOTO 853/854 series toilets—including CST853, CST854, MS853113, MS854114—this valve ensures optimal performance and water efficiency. Crafted from durable materials and precision-engineered by TOTO, it's the trusted solution for maintenance, repair, or new installations.

• Genuine TOTO OEM Part – Guaranteed fit for 853/854 one-piece toilet systems
• 1.6?GPF Efficient Flush – Meets EPA Tier?3 and WaterSense standards; updated replacement for THU460.15E-A
• Reliable & Durable – Precision-engineered and rigorously tested for long-lasting, clog-resistant operation
• Wide Model Compatibility – Works with Ultimate, Bristol, Plymouth, Willingham, MS853113, MS854114, 853/854 series
• Easy to Install – Direct swap-in with no toilet disassembly required—perfect for seamless repair jobs or upgrades

Weight	0.55 lb
Collection	853, 854
Finish Type	Plastic
Gallons Per Flush	1.6
Height	6.00 in.
Horse Power	1/3
Length	3.00 in.
Material	Plastic
Room	Bathroom
Sub Type	Tank Parts
Type	Toilet Parts & Accessories
Width	3.00 in.
Inventory Number	TOTTHU831-A
MPN	THU831-A