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Grainger Item # 46A967 | Mfr. Model # 911-M3
Catalog Page # 4042 (PDF)
Permit rapid system fill and sustained air purge flow with boiler feed valves from Grainger. High Capacity Feed Water Pressure Regulators are for use in commercial and residential hydronic heating systems to fill the boiler and piping system with water, and to maintain water pressure in the system at all times. Boiler feed valves provide make-up water to the system in the event of system leaks.