My hot water circulation system is used more as a cold water purge system. User hits a button and a pump runs for about a minute for that section of the house. I have four pumps each at the end of a dedicated return from the four corners of the house. All four pumps then return water through a manifold to a single pipe to the hot water heater. I don't really want to buy four air separators to place at the suction of each pump and I'm wondering if there's any point in putting it on the single return line to the cold inlet of the water heater which I can make the highest point in the system. I really don't have a particular issue without the air separator but want to put one in for good measure and to eliminate any air after servicing and purging the system.
My hot water circulation system is used more as a cold water purge system. User hits a button and a pump runs for about a minute for that section of the house. I have four pumps each at the end of a dedicated return from the four corners of the house. All four pumps then return water through a manifold to a single pipe to the hot water heater. I don't really want to buy four air separators to place at the suction of each pump and I'm wondering if there's any point in putting it on the single return line to the cold inlet of the water heater which I can make the highest point in the system. I really don't have a particular issue without the air separator but want to put one in for good measure and to eliminate any air after servicing and purging the system.