Urinal Drain Cleaning and Descaling in Phoenix

Urinals usually back up because a mineral crust has been growing inside the trap and the drain behind it for months. When a urinal is used, uric acid, calcium and lime build up, and the crystals form a solid mass that clings to the pipe. Phoenix adds to the supply: the city's 2025 water quality report lists total hardness of 172 to 302 ppm, which is hard water that scales pipes and fixtures. Low-flow and waterless urinals rinse the line less, so they scale up sooner.

The signs are gradual. The fixture drains a little slower each week, a plunge helps a little less each time, the odor returns soon after cleaning, and the staining will not wipe off. A dropped object stops a urinal suddenly. Scale closes it slowly. That difference tells you what you are dealing with.

These are three different tools, and they do different jobs.

• Chemical treatment is routine maintenance. A cleaner formulated for urinals dissolves fresh uric buildup, used on a schedule, and your staff can do it. Use the fixture maker's approved product. Kohler says mineral acids are not recommended for its waterless urinals.
• Jetting scours the pipe wall with a small hose. It clears the grease, sediment and soft scale from the trap arm and branch, and it carries the loosened material away. RIDGID's manual pairs small lines like urinals with a 1/8 inch hose, which fits a urinal branch.
• Descaling is for hard scale. It means knocking a crust off the pipe wall, and when the crust is thick, jetting alone may not do it. If the scale is hard enough, the next step may be to pull the urinal off the wall to reach the pipe. State Industrial calls that job time-consuming and says it can mean shutting the restroom.

A plunger or cable only opens a channel through scale, and the channel closes as new crystals grow. That is why a urinal that was "fixed" last month is slow again.

The restroom is closed off while we find the way into the line, clean it and check the result:

1. 1We check the flush and look at the trap to see how much scale there is.
2. 2We find access. A fixture trap that comes off without disturbing hidden pipe counts as a cleanout under the code. If it does not, we find the nearest cleanout on the branch.
3. 3We jet the branch with a small hose and clear the line to the point where it joins the main drain.
4. 4We run a camera through the branch if scale is suspected or the problem is a repeat, and we flush and test the fixture.
5. 5If the camera shows hard scale the jet will not remove, we tell you before we do anything else, and you decide on a fixture pull or a different approach.

Interior restroom work is scheduled before opening or after close, and we suggest closing one restroom at a time so another stays available. We give an upfront price before work starts.

A waterless urinal depends on a sealing liquid in the trap and a strainer, not a flush. Its maintenance has steps: lift the strainer, add the approved cleaner, let it stand 5 to 10 minutes, rinse with a gallon of water, and replace the sealing liquid. Kohler's instructions say to use cleaners formulated for waterless urinals and not mineral acids. We follow the maker's instructions for the fixture. See waterless versus flush urinals for the tradeoffs.

• It stopped suddenly. That is an object, not scale. A cable pass is the fix, and a camera is not needed unless it repeats.
• Several fixtures on the branch are slow. Then the line or a vent is the suspect, not the fixture. See commercial restroom repeat stoppages.
• The flush is weak. The code requires the flush to cleanse the fixture and refill the trap. A valve that delivers too little will scale the line again, and the valve needs adjusting.
• The pipe is old cast iron. Then the scale may be iron rust as well as mineral, and our page on cast iron drain descaling covers the next step.

Treat the urinals on a schedule, with a product the fixture maker approves, and log the date in the same place you log other maintenance. Use screens to catch debris. If a restroom keeps coming up in the log, put the branch on a scheduled drain maintenance program.

Call with the fixtures affected, how long they have been slow, flush or waterless, and when the restroom can close. We offer 24/7 emergency service and free estimates. See also commercial drain cleaning, hydro jetting and our guide to why urinal lines clog with scale.