Specification

NIDEL
®
Hose Connection
Backow Preventer
Model 37HD1
Model 37HD2
NIDEL
®
Anti-Siphon
Vacuum Breaker
Model 34H
Model 34HD
©2012 WOODFORD Mfg. 0494
Rev. 02/12 Form No.VB.104
HOSE CONNECTION BACKFLOW PREVENTER:
• Nidel®Model37HD1&37HD2
• ASSE1052Approved
• ListedbyIAPMO
• FieldTestable(seeinstructionsheet)
• Twocheckvalves
• Nosprayback
Exterior Finish: Brass(BR).Optional:ChromePlated(CH)
Construction:BrassandStainlessSteel
Check Valves:(2)Moldedrubberdiaphragms
Non-Removable:BushingattachedwithLOCKTITE®
Theft Resistant: Stainlesssteelstopcollarandstop
screw.(Model37HD2)
Inlet: 3/4″femalehosethread
Outlet Nozzle:3/4″malehosethread
Max Pressure -125p.s.i.
Max Temperature - 120° F
HOSE CONNECTION VACUUM BREAKER:
• Nidel®Model34H&34HD
• ASSE1011Approved
• ListedbyIAPMO
• ApprovedbyCanadianStandardsAssociation
• Onecheckvalve
Exterior Finish: Brass(BR).Optional:ChromePlated(CH)
Construction:BrassandStainlessSteel
Check Valve:Moldedrubberdiaphragm
Theft Resistant: Stainlesssteelstopcollarandstop
screw.(Model34HD)
Inlet: 3/4″femalehosethread
Outlet Nozzle:3/4″malehosethread
Max Pressure -125p.s.i.
Max Temperature - 120° F
TheNIDEL®Model37HD1/37HD2hoseconnection
backowpreventersareintendedforirrigationpurposes
anddesignedtoprotecthoseconnectionsfrombackow
contaminationinfreezingandnon-freezingconditions.
Manual draining is required and provides easy, sure
drainageduringfreezingweather.Usesincludeoutside
hosebibbs,washracks,dairybarnsandswimmingpool
areas.
The NIDEL® Model 34H anti-siphon vacuum breaker
is intended for irrigation purposes and designed to
protect hose connections from contamination where
temperatures do not go below freezing. Uses include
laundrytubs, utility sinks,boiler room hose bibbs and
outsidehosebibbsinnon-freezingareas.
TheNIDEL®Model34HDanti-siphonvacuumbreaker
is intended for irrigation purposes and designed to
protect hose connections from contamination where
freezingtemperaturesareexpected.Manualdrainingis
requiredandprovideseasy,suredrainageduringcold
weather.Usesincludeoutsidehosebibbs,washracks,
dairybarnsandswimmingpoolareas.
NOTICE: These products, as with all 1011, 1019, 1052
and 1053 ASSE listed devices, are not to be subjected to
continuous water pressure. Replacement is recommended
every 3-5 years. After use, turn device to open drain vents
or faucet may freeze and burst.
When ordering, specify model and nish.
37HD1 37HD2
34H
FOR NON-FREEZING
AREAS ONLY
34HD
FOR FREEZING AREAS
Manufacturedunderoneormoreofthefollowingpatents:U.S.Patents:3,414,001;4,178,956;4,316,481;4,532,954
D216,790;D216,791;D277,365;D277,366;CanadaPatents:852,529;865,995;1,146,438.Otherpatentspending.