W hen a 909/LF909 Series backflow preventer is installed for dead-end service applications (i.e. boiler feed lines, cooling tower makeup or other equip m ent with periodic flow require-ments), discharge from the relief vent may occur due to water supply pressure fluctuation during static no...
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Watts Backflow Preventers Water Safety Backflow preventers are necessary on water loops where the water is used in a hydronic loop that heats or cools