When we were doing new homes we were putting in hot water recirc pumps to get the instant hot water at the faucets. When I'd go back to these homes months later, for on reason or another, I would find the pumps unplugged and the valve shut off. If I asked the home owner about he would say the water never was more than luke warm with the pump on. They never really asked us to fix it. So when I did my own home I hired a different plumber who said the other guys didn't do it right and he would install a recirc system that would work. When the house was done the water was luke warm. I unplugged the pump and shut off the valve. That was ten years ago and I really havn't thought about it much. Seems to be alot of good answers on this forum and it would be nice to have instant hot water. Basically the hot water pipe loops around to all the faucets then back to the mech room with a check valve, pump, and then a tee into the cold water supply at the water heater. Any ideas?