- Flush Rate: 1.0 GPF Ultra High Efficiency (WaterSense Certified, ADA Compliant)
- Bowl Shape: Elongated, Universal Height
- Design: One-piece skirted (concealed trapway)
- TORNADO FLUSH: Hole-free dual-nozzle system
- CEFIONTECT: Ion-barrier smooth glaze
- WASHLET+ Ready: T40 connection with concealed cord/supply channel
- Auto Flush Compatible
- Rough-In: 12"
- Color: Cotton White
- Designed for T40 WASHLET+ bidet seats; compatible with SS124, SS234 SoftClose seats sold separately.
TOTO CST604CUFGAT40#01 UltraMax II 1G Toilet Documentation
- TOTO CST604CUFGAT40#01 One-Piece Toilet Product Spec Sheet
- TOTO CST604CUFGAT40#01 One-Piece Toilet Installation Guide
- TOTO CST604CUFGAT40#01 One-Piece Toilet Parts List
*This product is in TOTO's cotton white color - which is your regular clean white that will match your other white bathroom fixtures.
TOTO CST604CUFGAT40#01 UltraMax II 1G Toilet UPC number: 739268404762.
TOTO CST604CUFGAT40#01 UltraMax II 1G One-Piece Elongated 1.0 GPF WASHLET+ Toilet, No Seat
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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.
• 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.
• Will this toilet still flush during a power outage?
Yes. This UltraMax uses a gravity flush operated by the trip lever, so its basic flush does not require electricity. It can flush manually as long as the tank has water. An electronic bidet seat or powered accessories, if added separately, need electricity for their own functions.
• What is the practical difference between this one-piece toilet and a two-piece toilet?
This UltraMax has the ceramic tank and bowl formed as one unit, so there is no tank-to-bowl joint to clean around or separate tank gasket at that connection. It must be handled as one heavier fixture during installation. Flush performance depends on the specific model, rather than the number of ceramic pieces.
• Can I use drop-in cleaning tablets in the toilet tank?
No. TOTO advises against in-tank bowl cleaners because concentrated cleaning chemicals can damage the internal seals and fittings and lead to leaks. Clean the bowl separately with a non-abrasive cleaner and a soft brush, following the toilet care instructions.
The TOTO UltraMax II 1G WASHLET+ One-Piece Toilet uses just 1.0 GPF with TORNADO FLUSH and CEFIONTECT for maximum cleaning efficiency and water conservation. One-piece skirted design for easy cleaning and WASHLET+ ready.

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