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450STDA Double Check Detector Assembly, 4" to 10", Lead-Free*

Unique ref.: zurn-450STDA
Brand: Zurn Wilkins
Product family: Non-Return Valves for Liquid Services
Product group: Backflow Prevention Valves
Date of publishing: 2017-10-30
Edition number: 1
Type: Object (single object)
This product is no longer available for download. Please contact manufacturer for more details.
Designed for drop in replacement of competitor valves and new installation on water lines in fire protection systems to protect against both backsiphonage and backpressure of polluted water into the potable water supply. Model 450STDA shall provide protection where a potential health hazard does not exist. Incorporates metered by-pass to detect leaks and unauthorized water use. Meets the requirements of NSF/ANSI 61*

*Product contains weighted average lead content less than 0.25% for wetted surfaces.

The Double Check Detector Backflow Prevention Assembly shall be certified to NSF/ANSI 61, ASSE® Listed 1048, and supplied with full port gate valves. The main body and access cover shall be 304L Stainless Steel, the seat ring and check valve shall be Noryl™ (NSF Listed), the stem shall be stainless steel (ASTM A 276) and the seat disc elastomers shall be EPDM. The first and second check valves shall be accessible for maintenance without removing the device from the line. The Double Check Detector Backflow Prevention Assembly shall be a ZURN WILKINS Model 450STDA.


Material main: Stainless steel
Material secondary: Stainless steel
Designed in: United States
Manufactured in: United States

BIMobject Category: Plumbing - Valves
IFC classification: Valve
UNSPSC name: Valves
UNSPSC code: 401416
Uniclass 1.4 Code: L7136
Uniclass 1.4 Description: Valves
Uniclass 2.0 Code: PR-94-94-xx
Uniclass 2.0 Description: Backflow Prevention Devices
Uniclass 2015 Code: Pr_65_54_95_05
Uniclass 2015 Description: Backflow prevention devices
NBS Reference Code: 94-94-xx
NBS Reference Description: Backflow Prevention Devices
CSI MasterFormat 2014 Code: 40 05 67.16
CSI MasterFormat 2014 Title: Double Check Valve Assembly Backflow Preventers for Process Service
OmniClass Number: 23-27 31 11
OmniClass Title: Backflow Preventors
CSI UniFormat II Code: D3040
CSI UniFormat II Title: Distribution Systems

BIMobject SEEK Properties

Plumbing - Valves

Name Value
Connection Size 4" — 10"
Working Pressure 20 psi — 175 psi

BIMobject®