What is commercial faucet and flushometer repair?
Commercial restrooms don't use the tank toilets found in most homes. They use flushometers, also called flush valves: tankless valves mounted on the toilet or urinal that use line pressure to deliver a measured flush. They're tough, but they rely on small rubber parts, a diaphragm or piston, a relief valve and seals, that wear out with thousands of uses. When one fails, the fixture may run nonstop, flush weakly, flush twice, or leak from the top.
Faucets are the other half. Commercial buildings use metering faucets that shut themselves off, sensor faucets with solenoid valves, kitchen pre-rinse sprayers, and service sink faucets with hose connections. Each has cartridges, seals and valves that fail in their own ways.
These might look like small repairs, but they add up. A single running urinal or toilet wastes water around the clock and shows up on the water and sewer bill. A building with dozens of fixtures can lose a lot of water to a handful of bad parts. Fixture repair is often the fastest, cheapest leak fix in a commercial building, and it's worth ruling out before anyone starts looking under slabs or digging up service lines.
What does each symptom usually mean?
| Symptom | Likely cause |
|---|---|
| Toilet or urinal runs constantly | Worn diaphragm or piston, or a clogged bypass hole that won't let the valve close. |
| Weak or short flush | Wrong or worn parts, a partly closed control stop, or low water pressure. |
| Water spraying from the top or handle | Failed vacuum breaker or worn handle packing. |
| Sensor fixture flushes by itself | Sensor range or angle, low batteries, or a failing solenoid. |
| Metering faucet won't shut off | Worn cartridge or debris in the timing mechanism. |
| Sensor faucet drips or runs on | Debris in the solenoid valve or a failing solenoid. |
| Kitchen sprayer leaks at the head | Worn spray valve seals or a damaged hose. |
How are commercial fixtures repaired?
Flush valves
The plumber closes the control stop on the side of the flush valve, opens the cover, and replaces the diaphragm or piston kit with the correct model-specific part. Using the right kit matters, because kits are matched to flush volume and a mismatched one wastes water or flushes poorly. Vacuum breakers, handle assemblies and stop seals are replaced as needed, then the control stop is adjusted for a proper flush.
Sensor flushers and faucets
Batteries or power supplies are checked first, then sensor range and settings. Solenoid valves are cleaned of debris or replaced, and filter screens at the inlet are cleared. Sensor problems that come back often trace to sediment in the supply lines.
Faucets
Cartridges, seals and aerators are replaced to match the manufacturer, and supply stops and braided supply lines under the sink are checked for weeping. Kitchen pre-rinse sprayers and service sink faucets get new seals, valves or hoses, and vacuum breakers on hose connections are checked.
Whole-restroom tune-ups
When several fixtures in the same building start failing, it's usually more efficient to service every flush valve and faucet in one visit, with matched parts, than to chase them one at a time. That's often when a property manager sees the water bill drop.
Upgrades worth considering
Repairs are a good moment to think about upgrades. Lower-flow flush valves matched to compatible bowls, sensor faucets with automatic shutoff, and WaterSense-labeled fixtures can all reduce water use in busy restrooms. Pressure-reducing valves keep building pressure in a range that's easier on fixture parts. A plumber can tell you which fixtures are worth rebuilding and which are better replaced, so you aren't putting new parts into a valve body that's near the end of its life.
What are the warning signs of fixture leaks?
- The sound of water running in a restroom after hours.
- Water on the floor around a urinal or toilet after flushing.
- Water spraying or dripping from the top of a flush valve.
- Faucets that keep running long after they should shut off.
- A water bill that rises with no change in occupancy.
- Sensor toilets flushing repeatedly with nobody there.
- Stains or soft drywall below wall-mounted fixtures.
- A meter that moves overnight when the building is empty.
What causes commercial fixtures to leak and run?
- Worn rubber parts. Diaphragms, pistons and seals wear with use and harden with age and water chemistry.
- Debris and sediment. Grit from main breaks or pipe work clogs bypass holes, filter screens and solenoids.
- Wrong replacement parts. Generic or mismatched kits that don't fit the valve model.
- Pressure problems. High pressure wears parts faster. Low pressure gives weak flushes.
- Heavy use and abuse. High-traffic restrooms in schools, transit and retail wear parts out quickly.
- Loose mounting. Wall-hung fixtures and carriers that loosen can stress supply and drain connections.
What can facility staff check safely?
- Walk the restrooms after hours and listen for running water.
- Note the brand and model printed on flush valve covers and faucets.
- For a running fixture, a trained staff member can close the control stop on the flush valve with a screwdriver to stop water until the repair.
- Replace batteries in sensor fixtures where the manufacturer's instructions allow.
- Check under sinks for dripping supply lines and stops.
Pro tip: do a night meter read
Read the water meter at closing and again at opening. With nothing scheduled to run, any usage overnight points to running fixtures or another leak.
Warning: don't disable the vacuum breaker
The vacuum breaker prevents dirty water from being siphoned back into the drinking water supply. Replace it if it leaks, never remove it.
What happens during the plumber's visit?
- Fixture surveyEach reported fixture is checked, and any others found running.
- Model identificationBrands and models are matched to the correct repair kits.
- RepairDiaphragms, pistons, vacuum breakers, cartridges or solenoids are replaced.
- AdjustmentControl stops and sensors are set for a full, clean flush or proper run time.
- Pressure checkBuilding pressure is checked if fixtures are failing early.
- ReportFixtures repaired, parts used, and any fixtures recommended for replacement.
What affects the cost of fixture repair?
| Factor | Effect on the job |
|---|---|
| Number of fixtures | Servicing many fixtures in one visit is more efficient per fixture. |
| Fixture type | Sensor and specialty fixtures use pricier parts. |
| Parts availability | Older or less common models may need special-order parts. |
| Access | Concealed valves behind panels take longer to service. |
| Timing | After-hours work for restrooms that can't close. |
When is a fixture problem urgent?
A fixture overflowing onto the floor, water spraying from a broken valve, or a leak dripping into the ceiling of the floor below needs immediate attention. Close the control stop or the restroom's supply valve, put up signage for the slip hazard, and call. If water is reaching the floor below or electrical fixtures, treat it as emergency commercial leak repair.
Wet floors are a slip hazard
Close the restroom or mark the area until water is cleaned up and the fixture repaired.
Faucet and flushometer FAQ
Why does my urinal keep running?
Most often a worn diaphragm or piston, or a tiny bypass hole clogged with debris, keeps the valve from closing. A rebuild kit usually fixes it.
Should we repair or replace old flush valves?
Rebuilding is usually cost-effective. Replacement makes sense when bodies are corroded, parts are no longer available, or you're upgrading to lower-flow fixtures.
Why do sensor toilets flush on their own?
Sensors can pick up movement nearby or reflections, especially when range settings or batteries are off. Adjusting the sensor or replacing the solenoid usually stops it.
Can low-flow fixtures cause problems?
Mixing low-flow valves with bowls not designed for them can cause poor flushing and clogs. Valves and fixtures should be matched.
How often should restroom fixtures be serviced?
High-traffic restrooms benefit from periodic inspections. Others can be serviced as issues arise. A night meter read is an easy way to catch problems early.
Is a running toilet really a leak?
Yes. Water passing through a fixture without being used is a leak, even if none of it ends up on the floor. It shows up on the water and sewer bill.
Related services and areas
Retail centers around Thrasher's Corner and busy restaurants and shops in Downtown Bothell put restroom fixtures through heavy daily use. If your water bill is high and the fixtures check out, the leak may be on the main water line or under the slab. For the full range of help, see commercial leak services in Bothell WA.