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Wilkins 720A-075 3/4 inch PVB Backflow Preventer

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Product Code: WK720A-075

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Description

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Wilkins 720A-075 - 3/4" Pressure Vacuum Breaker

	Installation Specs
	WK720A-075
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WILKINS MODEL 720A PRESSURE VACUUM BREAKER ASSEMBLY:

Designed for installation on potable water lines to protect against backsiphonage of contaminated water into the potable water supply. Assembly shall provide protection where a potential health hazard exists.

Features & Benefits

Tapped ball valves with threaded test cocks allows installation in either position allowing direct replacement of other manufacturer's PVB, regardless of orientation
Bronze Bonnet for greater strength and durability
Serial Number visible in any installed orientation
Top access for easy maintainability
Protects against backsiphonage
Typical application: irrigation system
Owner must protect from freeze damage
Maximum working water pressure: 150 PSI
Maximum working water temperature: 110°F
Hydrostatic test pressure: 300 PSI
End connections threaded: ANSI B1.20.1

Specifications

The Pressure Vacuum Breaker shall be ASSE 1020 approved, and supplied with full port ball valves. The main body and bonnet shall be bronze (ASTM B584), the loaded-air inlet shall use an silicone elastomer spring and seat disc. The entire assembly shall be accessible for maintenance and testing without removing the device from the line. The Pressure Vacuum Breaker shall be a WILKINS Model 720A.

Materials

Main valve body: Cast Bronze ASTM B584
Fasteners: Stainless Steel, 300 Series
Elastomers: Silicone (FDA approved); Buna Nitrile (FDA approved)
Polymers: Polypropylene (FDA approved); Delrin® (FDA approved)
Springs: Stainless Steel, 300 series

Standards Compliance

ASSE ® Listed 1020
IAPMO® Listed
CSA ® Certified
Approved by the Foundation for Cross-Connection
Control and Hydraulic Research at the University of Southern California

Dimensions

7-3/16" X 4-5/16" X 4-5/16" X 2-3/8"

Typical Installation

Local codes shall govern installation requirements. Unless otherwise specified, the assembly shall be mounted at a minimum of 12" (305mm) above the highest piping or outlet downstream of the device. Install with adequate drain and sufficient side clearance for testing and maintenance. The installation shall be made so that no part of the unit can be submerged. A pressure vacuum breaker cannot be installed where back-pressure could occur or where spillage of water from vent could cause damage.