We are exploring using single-pipe 75 degree water in outpatient clinics, and our focus is on improving infection prevention. Our strategy is to use a separate heating system for the tempered water than for the hot water. The advantage is that by never getting the water too hot, the chlorine level provided in the municipal water supply continues through the system. I am curious if anyone has any thoughts on that. Right now, we see the benefits for infection prevention as follows:

  1. Dead legs are reduced by 50%

  2. The number of angle stops are reduced by 50%

  3. The water stays below 77 degrees

  4. The water stays chlorinated

We are also looking for reasons not to do this, and we are coming up empty. 77 degrees does not feel too cold, and may be more consistently delivered. This morning, I checked a two-pipe sink that I know can be cold and the water was 67 degrees. This feels like cold water, where the 77 degree water feels like tempered. Are there any reasons why we should not do this?