Making Waterless Urinals Work

  April 26, 2010

I'm Dan Hounsell, editor of Maintenance Solutions magazine. Today’s topic is waterless urinals.

Installing or retrofitting restrooms with waterless urinals is relatively straightforward and simple. Most waterless urinals attach to the wall, similar to traditional urinals. The only difference is installers do not need to connect these urinals to existing water lines.

When retrofitting traditional urinals, installers must cap the water-supply lines. Depending on the valves on a building’s water lines, this step might require draining part of or the entire building. The only plumbing connection in retrofitting waterless urinals is at the existing gravity drain.

Before beginning a retrofit with waterless urinals, managers must consider several factors:

• The piping must have adequate drain slope. 1/4 inch per foot typically is recommended.
• Installers must use suitable piping materials.
• Installers should clean existing piping with a power snake
• Installers must follow the manufacture’s instructions.

Maintaining waterless urinals is not much more difficult than maintaining conventional urinals. As with traditional urinals, housekeepers should clean and disinfect waterless urinals daily.

In high-traffic areas, cleaning should occur more frequently. Depending on the manufacturer of the liquid-sealant cartridge, replacement might depend on elapsed time or the number of flushes. It can range from three months to six months or 1,500 uses to 7,000 uses.

For urinals without cartridges, housekeepers should perform a bi-weekly flush-out, which entails purging the urinal with 1 gallon of water to force out remaining liquid sealant and waste.

The next step involves using a recommended cleaning agent. A worker should pour 2 more gallons of water into the urinal drain to clean the piping. The final step is to replace the liquid sealant. Dry-type cartridges do not require replacement, but workers should remove them regularly and flush any sediment.


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