The Febco 901-549 internal repair kit rebuilds Series 710 1" atmospheric vacuum breakers. It restores worn internals with original-spec bronze components and lightweight plastic poppets to reestablish positive protection against backsiphonage for irrigation, laboratory, and industrial service. Rebuilds Series 710 (1") atmospheric vacuum breakers Bronze body components for corrosion resistance Lightweight plastic poppets to restore sealing performance Max working pressure: 150 psi (10.3 bar) Ideal for hose bibs, turf irrigation, chemical vats, X-ray tanks, lab sinks Includes parts to replace worn internals; helps avoid full valve replacement Install using the included documentation and follow local plumbing codes; annual inspection and service of backflow assemblies is recommended to maintain protection and compliance. This kit is a direct-fit Febco OEM repair part for technicians and facilities managers who need a reliable, cost-effective field service solution.