- CSA: B64.1.1
- ASSE: 1001
- Highest hazard protection: high or severe
- Back pressure resistant: no
- Continuous pressure resistant: no (12 hours maximum)
- Field testing required: no
Overview/Benefits
- Provide reliable protection from back siphonage only if minor or moderate hazards exist.
- AVB devices do not provide adequate backflow protection when
- back pressure can be developed on the downstream side of the device;
- the device is located in an area subject to flooding;
- The device is under constant pressure for more than 12 hours, because the float disc can get stuck in the open position, rendering it inoperative in the event of back siphoning.
- The critical level must be located at least 150 mm above the overflow level of the fixture, container or accessory.
Application examples
- Washing tank
- Outdoor faucet hose
- Potato-peeling machines
