How Does a Flushometer Work?
A flushometer is a commercial-grade flushing device typically found on wall-mounted toilets and urinals in public and commercial restrooms. Unlike traditional gravity-flush toilets that use a water tank, a flushometer connects directly to a pressurized water supply line. When activated, either manually or automatically, the flushometer valve opens and immediately releases a measured amount of water directly into the bowl.
Key parts of a flushometer include:
- Control Stop Valve – regulates water supply to the unit
- Diaphragm Assembly or Piston Assembly – controls water pressure and timing of the flush
- Handle or Sensor Assembly – manual lever or motion sensor to activate the flush
- Vacuum Breaker – prevents backflow into the water supply
- Spud Coupling – connects the valve to the toilet or urinal
This pressure-based system allows for rapid and consistent flushes, making it ideal for high-use environments. But due to their complexity, flushometers require specialized expertise for troubleshooting and repair.
Customer Reviews
I was experiencing a problem with my toilet ...the flushometer broke. I tried to fix it myself and still no good then I called Roto-Rooter and they arrived the same day and was very professional and outgoing. My toilet was installed wrong when I first bought the house however it was fixed and now we are all happy !!!!!!
Thank you Roto-Rooter. Lydia R
The technician was on time and fixed our flushometer on our toilet very quickly. He was very polite and professional. Thanks for the great service! Trystan G
Wonderful experience, exceptional response time, excellent customer service and I would not hesitate to refer this company. The tech was knowledgeable in explaining that our toilet flushometer was broke, diagnosed, corrected the problem and was on his way. I am a totally satisfied customer!! Dean M
Frequently Asked Questions
Why does my toilet flushometer keep flushing?
Continuous flushing is often caused by a faulty diaphragm assembly or sensor malfunction. It’s important to have the unit inspected and repaired promptly to avoid water waste.
What is the minimum pressure for a flushometer?
Most flushometers require a minimum water pressure of 25 PSI to operate correctly. Insufficient pressure can lead to incomplete flushes or operational issues.
Why is my flushometer not flushing enough water?
Low water pressure, a clogged diaphragm, or an improperly set flow volume may cause weak flushing. A licensed plumber can diagnose and adjust the system for optimal performance.
What is the life expectancy of a flushometer?
With proper maintenance, a flushometer can last 15 to 20 years. Regular inspections and part replacements help extend its service life.
Why would a flushometer keep running?
A flushometer may keep running due to a worn diaphragm, clogged bypass, or debris preventing the valve from sealing. Professional maintenance can resolve the issue efficiently.


