It's just unreliable. There is absolutely no pattern to it. The day or the hour doesn't determine when it's hot, cold, or warm. To rely on such a system is nonsense. It's too much work to keep up, so we just quit trying.

Ad Seg (the Hole) in Chino, California has about 100 cells. The building is old and its plumbing has many issues. Hot water is a rare luxury. I have no idea how big the Hole's hot water heater is, but it's not big enough.

Each of the 100 cells has its own sink. Each sink gets hot water from the building's hot water heater. All the pipes are mingled and each affects another...