In zone valve setups, a separate zone valve is installed in the pipe to or from each zone. In most installations, the zone valves are in the returns, where the water is cooler. The cooler temperatures ...

HOLLY, Mich. (Oct. 27, 2015) — Bar's Leaks has introduced its Valve Seal Oil Consumption Repair additive to restore valve seals that have shrunk, hardened or cracked due to age, high mileage or ...