ZURN 720A Wilkins Pressure Vacuum Breaker Assembly Owner’s Manual
- June 13, 2024
- ZURN
Table of Contents
Model 720A
Pressure Vacuum Breaker Assembly
Application
Designed for installation on irrigation water lines to protect against backsiphonage of contaminated water into the potable water supply. Assembly shall provide protection where a potential health hazard exists. For non- potable applications only.
Standards Compliance
- ASSE® Listed 1020
- UPC® Listed
- CSA® Certified B64.1.2
- Approved by the Foundation for Cross-Connection Control and Hydraulic Research at the University of Southern California
Materials
| Main valve body | Cast Bronze ASTM B584 |
|---|---|
| Fasteners | Stainless Steel, 300 Series |
| Elastomers | Silicone |
Buna Nitrile
Polymers| Polypropylene
POM Acetal (Delrin®)
Springs| Stainless Steel, 300 series
Features
Sizes: 1/2″, 3/4″, 1″, 1 1/4″, 1 1/2″, 2″
| Maximum working water pressure | 150 PSI |
|---|---|
| Maximum working water temperature | 110°F |
| Hydrostatic test pressure | 300 PSI |
| End connections threaded | ANSI B1.20.1 |
Accessories
- Repair kit (complete)
- Water Hammer Arrester (Model 1260XL)
- QT-SET Quick Test Fitting Set
Dimensions & Weights (do not include pkg.)
| MODEL SIZE | DIMENSIONS (approximate) | WEIGHT |
|---|---|---|
| A | B | C |
| in. | mm | in. |
| 1/2 | 15 | 7 1/8 |
| 3/4 | 20 | 7 3/16 |
| 1 | 25 | 7 3/4 |
| 1 1/4 | 32 | 11 |
| 1 1/2 | 40 | 10 1/2 |
| 2 | 50 | 11 1/16 |
Flow Characteristics
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.
Capacity thru Schedule 40 Pipe
Pipe size| 5 ft/sec| 7.5 ft/sec| 10 ft/sec| 15 ft/sec
1/8″| 1| 1| 2| 3
1/4″| 2| 2| 3| 5
3/8″| 3| 4| 6| 9
1/2| 5| 7| 9| 14
3/4″| 8| 12| 17| 25
1″| 13| 20| 27| 40
1 1/4″| 23| 35| 47| 70
1 1/2″| 32| 48| 63| 95
2″| 52| 78| 105| 167
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. For non-potable applications only. The Pressure Vacuum Breaker shall be a Zurn Wilkins Model 720A.
Zurn Industries, LLC | Wilkins
1747 Commerce Way, Paso Robles, CA U.S.A. 93446 Ph.
855-663-9876, Fax
805-238-5766
In Canada | Zurn Industries Limited
7900 Goreway Drive, Unit 10, Brampton, Ontario L6T 5W6,
877-892-5216
www.zurn.com
Rev. G
Date: 9/23
Document No. BF-720A
Product No. Model 720A
Patent zurn.com/patents
References
Read User Manual Online (PDF format)
Read User Manual Online (PDF format) >>