Catalog: Backflow Preventers - Diamond Head Sprinkler Supply

Dual CheckBackflow PreventersDUC-40 SeriesDUAL CHECK VALVEThe Apollo Series DUC-40 Dual Check Valve prevents backflow by either backpressure or backsiphonageresulting from a cross-connection between potable water lines and substances thatare objectionable, but not health-hazards.FEATURES• In-line repairable• Low pressure loss• Corrosion resistant• Compact and lightweight• Independently-acting check valves• ASSE 1024• CSA B64.6• Available in standard and swivel types• MADE IN THE USASizes 1/2", 3/4", 1"MATERIALSBodyBronzeCapsBrassSpringsStainless SteelSeat DiscsEPDMPERFORMANCE RATINGMaximum Operating Pressure 175 psiTemperature Range 33° F - 180° FAPPROVALSASSE ® 1024 and CSA ® B64.6ORDERING CODE -40 - 3 X X - X X XINLET CONNECTION 1,2A – FNPTB – MNPTC – Female Meter ThreadE – Male Meter ThreadS – Female Meter Swivel2 – Female BSPPINLET AND OUTLET SIZE3 – 1/2"4 – 3/4"5 – 1"OUTLET CONNECTION 1,2A – FNPTB – MNPTC – Female Meter ThreadE – Male Meter ThreadF – Female BSPPOPTIONS (CAN BE COMBINED)TP-w/Test Ports Drilled, Tappedw/PlugsTC-w/3 1/8”x1/4” Test CocksNotes:1For meter threads, order one size larger than meter size.Example: 40-3S5-4A = 3/4” female meterswivel inlet x 3/4” FNPT outlet.2Not all inlet and outlet combinations are available. Please contact ConbracoCustomer Service for availability.* Standard body not drilled & tapped for testcocks.Dimensions (in.) – Weights (lbs.)Size 1/2" 3/4" 1"A 4-3/8 4-3/8 4-3/8B 3-1/2 3-1/2 3-1/2C 1-1/2 1-1/2 1-1/2Wt. 2 2 2.1Wt. (w/test cocks & ball valves) 4 4.6 6.428Customer Service 1-704-841-6000