Toilet Retrofit / Water Fixture Upgrade

• 55 out of 97 Toilets were replaced with 3.0L units
• Showerheads upgraded to 1.5 GPM
• Kitchen Aerators upgraded to 1.5 GPM
• Bath Vanity Aerators upgraded to 1.0 GPM

Leak Rate from 18.6% to 0.0%

Before: Consumption per unit / day  = 0.62 m3 / unit / day. After:  Consumption per unit / day  =  0.45 m3 / unit / day

As a result of:

1. replacing toilets that were > 3.0 L
2. replacing shower heads and;
3. installing aerators on kitchen sinks and bath vanities

The leak rate as a percentage of total consumption was reduced from 18% to 0%.  In addition to eliminating the leaks, the per unit usage on a daily basis has dropped as a result of the more efficient toilets being rolled out. The building inventory of toilets are now all 3.0L with a mix of ProFlo (new ones installed) and Hennesy Henchcliffe (legacy 3.0 L already installed).

3.0L Toilet replacements throughout.
Bath Vanity Aerators upgraded to 1.0 GPM

Summary Daily Usage with Leak Rate Reduction

• Leak rate dropped from 18% to 0%
• Daily volume dropped from 60k / day to approx 40k / day

60 Day Snapshot : Oct 7th Completion Date

• Drop in daily consumption
• Elimination of leak rate by address toilets, showerheads and aerators
• Before / During and After   Installation was Oct 4th – Oct 7th, 2021

Pre Retrofit Weekly Pattern

Post Retrofit Weekly Pattern – Notable drop in off peak usage 

24 Hour Usage Pre Retrofit

• 17.7% Leak rate
• Avg Flow  41.9 L / min

24 Hour Usage Post Retrofit 

• Drop in overall usage.  Average Flow 25.6L / min
• Significant periods in off peak with no water usage.  Zero (0) % leak rate