TOTO THU800-A – Replacement Drain Valve Assembly for CST634/644 and MS618114CEFG Toilets
The TOTO THU800-A is a genuine TOTO replacement flush valve assembly designed to restore proper flushing performance in compatible TOTO toilets. The complete assembly features durable plastic construction with the integrated overflow tube and internal flush valve components for a reliable factory-fit replacement.
Features
- Genuine TOTO replacement part
- Complete flush valve assembly
- Integrated overflow tube
- Designed to restore proper toilet flushing operation
- Durable plastic construction
- Factory-designed fit for compatible TOTO toilets
- Includes installed internal flush valve components and seal
- Manufacturer: TOTO
- Part Number: THU800-A






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