Home water heater through 6 points of hot water, only three points out of hot water, the other out of warm water. And the location of the hot water and warm water are used together to warm the wall, do a circulating hot water. Whether I am hot water or return water to the hot water is always only a point of hot water, but one of the points of the location of the change
This problem is really the first time encountered. Usually the pipeline is too long, you need to take a long time to solve the water, because the cold water in the pipeline to go out of the reasons. As for your question, since you have found a hot water and warm water at intervals, then you let the plumber turn the basin faucet and the shower into the water pipe down is not the problem solved. If resolved, then it is your hot water separator problem, because you divided the six exports, may be a water separator or you use 3-channel change, then it is a problem. hope this helps!
There is a problem with the setting of the circulating water pipe
