A large portion of the water savings targets of most municipal water-efficiency programs are related to the installation of water-efficient toilets.  If target savings are to be realized and sustained, however, toilets installed as part of these programs must flush with the appropriate flush volume (typically 1.6 gallons / 6 litres) not only when installed but as they age and require adjusting or repair, otherwise they may be double-flushed or removed, or they may fail to meet the customers’ expectations for performance.

While there has been a significant level of research concerning flush volumes and performance of ‘residential’ toilets (typically gravity-operated), there has been very little research completed on ‘commercial’ toilets, i.e., flushometer bowl and valve combinations.

Specific concerns of rebating agencies regarding commercial toilets include:

·         Performance:  There is some question as to whether performance or water savings are affected by mixing and matching different flushometer bowls and valves.

·         Long-term Savings: Can savings be assured/sustained if valves can be adjusted to flush with greater volumes, or 1.6-G/6-L pistons or diaphragms replaced with 3.5-G/13-L components?

Veritec has completed a lab testing program to identify performance variations between different bowl/valve combinations, and evaluate the potential for valves operating at greater than six litres of water.

Go to the "Reports" section to download reports illustrating the results of product testing by Veritec.