Backflow Preventers, Double Check


Zurn Double Check Valve Backflow Preventers are mechanical safety devices installed in water distribution systems to prevent the reverse flow of contaminated water back into the public water supply through cross-connections in commercial and residential properties. These assemblies feature two independently operating check valves with test cocks that allow water utilities and certified backflow testers to verify proper operation and ensure compliance with state and local cross-connection control programs. Water utilities require the installation and annual testing of Zurn double check valve assemblies at specific locations such as irrigation systems, commercial buildings, and industrial facilities to protect public health and maintain the integrity of municipal drinking water systems.

Zurn 950XL Double Check Backflow Preventer

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Mfr. Part #

Product # 112561

Zurn Wilkins 34-950XLT2FT 3/4"" Double Check Water Valve Backflow Preventer Assembly

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Mfr. Part # 34-950XLT2FT

Product # 112560

Zurn Wilkins 2-950XLT 2" Double Check Water Valve Backflow Preventer Assembly

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Mfr. Part # 2-950XLT

Product # 112558

Zurn 950XLT Double Check Backflow Preventer

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Mfr. Part #

Product # 112559

Zurn Wilkins 1-950XL3 1" Double Check Water Valve Backflow Preventer Assembly

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Mfr. Part # 1-950XL3

Product # 112557

Zurn 950XL Double Check Backflow Preventer with Union Ball Valves

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Mfr. Part #

Product # 112556

Zurn 350XL Double Check Backflow Preventer

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Mfr. Part #

Product # 112551

Zurn Wilkins 1-350 1" Double Check Water Valve Backflow Preventer Assembly

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Mfr. Part # 1-350

Product # 112550

Zurn 450DA Double Check Detector Backflow Preventer

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Mfr. Part #

Product # 112517

Zurn 350DA Double Check Detector Backflow Preventer

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Mfr. Part #

Product # 112504

Zurn 350ASTDA Double Check Detector BFP with Post Indicator & OS&Y Gate Valves
$8,543.99

Mfr. Part #

Product # 112502

Zurn 350ASTDA Double Check Detector Backflow Preventer

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Mfr. Part #

Product # 112498

Zurn 350AST Double Check BFP w/Grooved End Butterfly Gate Valves

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Mfr. Part #

Product # 112497

Zurn Wilkins 4-350AOSY 4" Double Check Water Backflow Preventer OSY Gate Valves FLG

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Mfr. Part # 4-350AOSY

Product # 112496

Zurn 350ADA Double Check Detector Backflow Preventer

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Mfr. Part #

Product # 112493