- Automatic Flush: Activates flush after user stands, with delay settings that vary by sitting or standing position.
- Manual Override: Button on the remote allows manual flush if preferred, or for power outage backups.
- Simple Installation: Swaps out the existing flush button; users report it was "very easy" to install themselves.
- Durable Design: Engineered by TOTO for long-term operation with minimal maintenance.
- Portable Button: Includes replacement button for S7A remote (single-flush only).
For dual-flush (1.28 GPF/0.9 GPF) toilets please see the TOTO THU855 Auto-Flush Kit.
TOTO THU857 Auto-Flush Kit for S7 and S7A Washlets for Single Flush Toilets
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Frequently Asked Questions
• What if my order arrives damaged?
While we take great care in the packaging and handling of orders, we ask that customers inspect all shipments within 48 hours of delivery, and in the rare event that your order arrives damaged, please send us an email with a photo showing the damages (so we can file a claim with the carrier), and let us know whether you prefer a free replacement or a refund.
• What if I need to return something?
We accept returns within 30 days of delivery. Customers are responsible for return shipping unless we sent the wrong item, the product is defective, or it was damaged during transit. All returns are subject to a 15% restocking fee unless we sent the wrong item, the product is defective, or it was damaged during transit. The restocking fee is what we get charged by the manufacturer – it is not to discourage returns. To return an item, email us, and we'll guide you through the process.
• Why do you ask for phone numbers during checkout?
Some shipping carriers, especially those handling freight, require a phone number to coordinate your delivery. We respect your privacy and guarantee that any information you provide will never be shared with third parties, except for shipping purposes.
Compatibility: Designed exclusively for TOTO WASHLET+ T40 toilets with single-flush (1.28 or 1.6 GPF) systems. Works seamlessly with WASHLET+ S7A/S7 bidet seats.
Functionality: Provides hands‑free automatic flushing once the user stands up, improving hygiene and convenience. Also includes a manual flush button integrated into the remote unit for flexibility.
Exclusions: Not compatible with dual‑flush systems (e.g. THU855, THU766), nor with Washlet models like S550e, S500e, or round‑seat S7A/S7 configurations.