I had to turn on the hot water supply to the cold water tempering valve for the FLs. I noticed that the cold fill was getting kinda slow so the valve was unhappy with just cold water, but the flow picked up immediately when it could go back to making 80F cold water. I am so happy that John found the valve while exploring the Habitat for Humanity thrift store. When the tropical plants live inside during the cold months, I use water from it to water them and keep the pots up off the floor so that the roots do not get cold.