TOTO Two-Piece Toilet Flush Valve Replacement Kit | 3-Inch

Keep your TOTO toilet running like new with this precision-engineered Two-Piece Toilet Flush Valve Replacement Kit. Designed specifically for 3-inch TOTO two-piece toilet tanks, this complete replacement kit tackles the most common causes of a running or leaking toilet — worn valves, failing gaskets, and deteriorated seals — restoring proper flush performance quickly and affordably.

Made in Mainland China.

Why Choose This Flush Valve Kit?

• TOTO Compatible: Engineered to fit TOTO models THU 440-1, THU 460.6d, THU 338-N, and THU 445.10F. Also compatible with older THU 440 parts and most standard 3-inch two-piece toilet tanks. Note: Not intended for one-piece toilets.
• Durable ABS Construction: Made from impact-resistant ABS plastic paired with a chemical-resistant silicone seal that resists warping, cracking, and deterioration over time — even with prolonged water exposure.
• Customizable Overflow Tube: The adjustable overflow tube can be cut to your exact required height, giving you a tailored, leak-free fit for your specific toilet tank configuration.
• Stops Water Waste: Replaces worn valves and gaskets to eliminate the slow, costly drip of a constantly running toilet — helping conserve water and reduce utility bills.
• Easy DIY Installation: Designed for homeowners of all skill levels, installation typically takes under 20 minutes with no special tools required. Save the cost of a plumber visit with a straightforward, intuitive setup.

Specifications

• Flush Valve Type: Foot-pressing type (split drain / two-piece)
• Material: ABS plastic with silicone seal
• Valve Size: 3-inch
• Compatibility: TOTO two-piece toilet tanks (THU 440-1, THU 460.6d, THU 338-N, THU 445.10F)
• Color: As shown in product images
• Country of Origin: Mainland China

Package Contents

• 1 × Toilet Tank Flush Valve Replacement Kit

Important: Please verify the size and compatibility with your current toilet setup before purchasing. Refer to the main product image for measurement guidance. Measurement tolerance: ±1–3 cm. Color may vary slightly due to screen settings and lighting.

Helpful Resources

For tips on water conservation and reducing household water waste, visit the EPA WaterSense Program — a trusted resource for efficient water use at home.

Related Products You May Like

• 1-1/4" Adjustable Washbasin Siphon Trap | Leak-Proof Silicone
• 1-Inch Threaded Brass Ball Valve – Water, Gas & Oil Flow Control

Frequently Asked Questions

Q: Which TOTO toilet models is this flush valve replacement kit compatible with?

A: This two-piece toilet flush valve replacement kit is specifically compatible with TOTO models THU 440-1, THU 460.6d, THU 338-N, and THU 445.10F. It is also compatible with older THU 440 parts. It is designed for 3-inch two-piece toilet tanks only and is not suitable for one-piece toilet configurations. Always verify your model number and tank size before purchasing.

Q: How long does installation take, and do I need a plumber?

A: Most homeowners can complete the installation in under 20 minutes without professional help. The kit is designed for easy DIY setup with no specialized tools required, making it a cost-effective alternative to hiring a plumber for a standard flush valve replacement.

Q: Can the overflow tube be adjusted to fit my toilet tank?

A: Yes. The overflow tube included in this kit is adjustable and can be trimmed to your specific tank height, ensuring a proper, customized fit and helping prevent overflow issues during normal flushing operation.

Q: What material is the flush valve made from?

A: The flush valve body is constructed from durable ABS plastic, and the sealing component uses a chemical-resistant silicone gasket. This combination resists warping and degradation from constant water exposure, providing long-lasting, reliable performance.