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SENTINEL 250™ FIRE HYDRANT 1.1 Shaded area indicates change Rev. 10-15 The Sentinel 250 Hydrant is designed around the needs of the people who maintain and repair it. The number of parts has been kept to a minimum and the hydrant designed to be easily repairable. ❏ MadetocomplywiththerequirementsofANSI/AWWA C502, ULListed,FMApprovedandCertifiedtoANSI/ NSF61&372andmanufacturedinaU.S.ISO9001 certifiedfactory. ❏ ADuctileIronbonnetissecurelyfastenedtotheupper standpipe with inter-locking “breech lock” lugs for tamperresistance.Itiseasilyremovedforaccessto the main valve. ❏ Thebonnetlockingscrewistamperresistant,assuring security of the bonnet by preventing its rotation. ❏ TheDuctileIronoperatingnutwithaweathershield weatherproofsthehydrant.DuctileIronprovides durabilityandwearresistance.Atamperresistant alloy steel locking pin fastens the operating nut to the revolving nut. Sentinel 250™ Fire Hydrant Features & Benefits ❏ Thebronzeholddownnutistotallyenclosedbytheskirt of the weather shield and is locked in the bonnet for extra security.ItisO-ringsealedforaddedprotection. ❏ Astopnutprovidesapositivehalttomovementofthe valve rod while opening. The rod cannot be placed in compression if the hydrant is “over-opened.” ❏ Ananti-frictionbearingensureseasyoperationby reducingfriction.Itismadeoftough,reliableAcetal Polymer for permanence and strength. ❏ Alubricationchamberisfilledwithall-temperature grease ensuring positive lubrication each time the hydrant is opened. ❏ Therevolvingnuthasthreechannelstoallowthe grease to move around the rod threads as well as above and below the thrust collar during operation. ❏ Thebronzerevolvingnutisthedirectconnection between the operating nut and the rod threads. True dry-topdesignisdoubleO-ringsealed. ❏ Abronzerodsheathprovidesasmoothbronze-tobronzenoncorrodiblesealingsurfaceforreliable, positivesealingbyO-rings. ❏ TheDuctileIronupperstandpiperesiststrafficimpact damage. ❏ Thehydranthasstreamlinedcurves.Boththenozzle sectionandthenozzleshavesweepingcurvesto providemaximumflowandminimumheadloss. ❏ Thethreaded-innozzlesareO-ringsealedand mechanicallysecuredwithstainlesssteelnozzlelocks. ❏ PROTECTOP™ ground line coupling ensuring reliable fractureandquickrepairaftertrafficimpact.The coupling can be easily removed to install an extension section or loosened to rotate the hydrant to any position after installation. ❏ Thestainlesssteelrod coupling is designed to break withtrafficimpact,leavingnoloosepiecesthatcould drop into the main valve area. ❏ Theuppervalveplateisallbronzeconstructionwith specially formulated plastic drain valve facings. ❏ Thehydranthasanallbronzedrainoutlet.Toensure a non clogging drain way which leads to double drains inthedrainring.Drainsareforcedflushedduring opening and closing of the main valve. ❏ Thecompressionmainvalveopensagainstpressure and is reversible providing a convenient spare in place. ❏ TheDuctileIronshoeisepoxycoatedontheinterior for maximum corrosion protection.