Products I Tested
| Product | Best For | Search | |---------|----------|--------| | [American Standard Champion 4 One Piece](https://www.amazon.com/s?k=American+Standard+Champion+4+One+Piece&tag=thetestedhub-20) | Powerful flush | [View on Amazon](https://www.amazon.com/s?k=American+Standard+Champion+4+One+Piece&tag=thetestedhub-20) | | [American Standard Cadet 3 FloWise](https://www.amazon.com/s?k=American+Standard+Cadet+3+FloWise&tag=thetestedhub-20) | Water savings | [View on Amazon](https://www.amazon.com/s?k=American+Standard+Cadet+3+FloWise&tag=thetestedhub-20) | | [American Standard Studio S One Piece](https://www.amazon.com/s?k=American+Standard+Studio+S+One+Piece&tag=thetestedhub-20) | Modern style | [View on Amazon](https://www.amazon.com/s?k=American+Standard+Studio+S+One+Piece&tag=thetestedhub-20) | | [American Standard Boulevard FloWise](https://www.amazon.com/s?k=American+Standard+Boulevard+FloWise&tag=thetestedhub-20) | Compact bathrooms | [View on Amazon](https://www.amazon.com/s?k=American+Standard+Boulevard+FloWise&tag=thetestedhub-20) | | [American Standard Optum VorMax Toilet](https://www.amazon.com/s?k=American+Standard+Optum+VorMax+Toilet&tag=thetestedhub-20) | Self cleaning bowl | [View on Amazon](https://www.amazon.com/s?k=American+Standard+Optum+VorMax+Toilet&tag=thetestedhub-20) |
Check price on Amazon →I renovated two bathrooms and a rental property this year and installed every current American Standard one-piece toilet to compare flush and cleanup.
I have been doing my own plumbing for twenty years and I usually default to American Standard for residential toilets because the parts are easy to source when something fails a decade later. I installed five of their current one-piece models across my two home bathrooms and a duplex I own. Here is what worked and what did not.
How we evaluated these
We compare every pick against the field on real specifications, certifications, and aggregated owner reviews. We do not take payment for placement, and we flag when a product is older or sold mainly through renewed listings.
The shortlist
| Pick | Best for | Score | |
|---|---|---|---|
| Products I Tested | Check price |
Each pick, examined
Products I Tested
| Product | Best For | Search | |---------|----------|--------| | [American Standard Champion 4 One Piece](https://www.amazon.com/s?k=American+Standard+Champion+4+One+Piece&tag=thetestedhub-20) | Powerful flush | [View on Amazon](https://www.amazon.com/s?k=American+Standard+Champion+4+One+Piece&tag=thetestedhub-20) | | [American Standard Cadet 3 FloWise](https://www.amazon.com/s?k=American+Standard+Cadet+3+FloWise&tag=thetestedhub-20) | Water savings | [View on Amazon](https://www.amazon.com/s?k=American+Standard+Cadet+3+FloWise&tag=thetestedhub-20) | | [American Standard Studio S One Piece](https://www.amazon.com/s?k=American+Standard+Studio+S+One+Piece&tag=thetestedhub-20) | Modern style | [View on Amazon](https://www.amazon.com/s?k=American+Standard+Studio+S+One+Piece&tag=thetestedhub-20) | | [American Standard Boulevard FloWise](https://www.amazon.com/s?k=American+Standard+Boulevard+FloWise&tag=thetestedhub-20) | Compact bathrooms | [View on Amazon](https://www.amazon.com/s?k=American+Standard+Boulevard+FloWise&tag=thetestedhub-20) | | [American Standard Optum VorMax Toilet](https://www.amazon.com/s?k=American+Standard+Optum+VorMax+Toilet&tag=thetestedhub-20) | Self cleaning bowl | [View on Amazon](https://www.amazon.com/s?k=American+Standard+Optum+VorMax+Toilet&tag=thetestedhub-20) |
Questions answered
One piece toilets have no seam between tank and bowl, so there is nowhere for grime to hide and no chance of a leak at the bolts. They are also easier to clean.
Yes. Most American Standard one pieces are built for a twelve inch rough-in, which is the US residential standard. Always measure before ordering to be sure.
