Many new flush mechanisms for residential use are coming with a dual flush option that can be used to save water. Typical modern single flush toilets will use 1.6 gallons of water per flush (gpf), or 6 litres. That is already a big saving on older units that could use as much as 5 gallons per flush). A dual flush unit adds a 0.8 gpf option for flushing liquid waste.

While the savings at home can be significant, the savings in a commercial installation are much higher since we spend so much more awake time at work than at home in general. So, installing dual flush options for office facilities and in other commercial buildings makes a lot of sense. If done right.

The photo shows the sign affixed to the wall above a new, eco-friendly flush unit installed in the building where my office is located. All sounds good, but I have two problems with this particular installation:

1. The reduced flush option is activated by pulling the handle up, which means most people will continue to use the full flush without even thinking about it.

2. It was fitted to a urinal, which should never need the ’solid waste’ option.

The combination of those two flaws makes this particular installation essentially useless. A regular 1 gpf urinal flush mechanism would probably have been a better choice for this location, especially since most people will press the handle down.