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Manufacturer Resources
Product Specs
- Product Type:
- Flush Valve
- Product Group:
- Commercial
- Product Subgroup:
- Parts and Accessories
- Family:
- SELECTRONIC DIAPHRAGM FV
- Luxury/Non Luxury:
- Non Luxury
- Residential Commercial:
- Commercial
- Product Length:
- 17.125
- Product Height:
- 4.25
- Product Weight:
- 6.506
- Product Width:
- 10.375
- Department:
- Plumbing
- Parts and Accessories Type:
- Flush Valve
- Application:
- Toilet
American Standard 624B121.002 – Frequently Asked Questions
1) Is the American Standard Ultima Selectronic 624B121 flush valve for a toilet or a urinal?
Toilet only. The Ultima Selectronic 624B121 is a diaphragm-type water closet flush valve rated at 1.28 gpf / 4.8 Lpf, which is the standard high-efficiency toilet volume. Urinals run at much lower volumes and need a urinal-specific valve, so don't substitute this one on a urinal fixture.
2) Will the 1.28 gpf Ultima Selectronic valve work on my existing 1.6 gpf bowl?
It depends on the bowl. The 624B121 delivers 1.28 gpf / 4.8 Lpf per flush, so it only performs correctly on a bowl engineered for 1.28 gpf. Putting it on an older 1.6 gpf bowl typically means poor bowl clearance and double flushing, which wipes out the water savings. Match the valve volume to the bowl rating stamped on the fixture.
3) What does "exposed" mean on this American Standard Selectronic flush valve?
Exposed means the valve body, sensor and control stop mount on the finished side of the wall, in view above the bowl, rather than being buried behind a wall panel with only a sensor plate showing. That makes it the retrofit-friendly choice on existing top-spud toilets and the easier one to service, since the diaphragm and stop are reachable without opening a chase.
4) Is this a diaphragm or piston flush valve, and does that matter for my building's water?
The 624B121 is a diaphragm type. Diaphragm valves are the common commercial choice and rebuild with a diaphragm kit; piston valves use a different internal assembly and different repair parts. If your maintenance shop already stocks diaphragm kits for American Standard Selectronic valves, this one stays in that family.
5) What finish does the Ultima Selectronic 624B121 come in?
Chrome, ordered as part number 624B121.002. That is the single finish offered on this base model, so it will line up with the polished chrome stops and supplies already on most commercial restroom toilets.
6) Is this flush valve rated for commercial restroom traffic or is it a residential part?
It is a commercial-duty product. American Standard groups the Ultima Selectronic exposed diaphragm valve under its commercial line, which is the line specified for office, school, and public restroom use rather than residential tank-type applications.
7) What does "base model" mean when ordering the Ultima Selectronic 624B121?
Base model is the standard configuration of the Selectronic exposed toilet valve, without the added options American Standard offers elsewhere in the line. If your spec calls for extras beyond straight sensor operation at 1.28 gpf in chrome, you are looking at a different model number in the same Selectronic diaphragm family.
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Does the American Standard 624B121.002 come with a warranty?
Absolutely. The American Standard 624B121.002 is backed by a manufacturer’s warranty.
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