Plastic Vacuum Breaker - 3/4" GHT

Vacuum breaker devices are recommended with any irrigation system with a shared water source. The DG41 Backflow Preventer (Atmospheric Vacuum Breaker) is an economical choice to prevent the risk of backflow contamination from outdoor hose bibb connected devices. Made of high-strength ABS plastic for reliability and durability. This fitting is not designed to be operated under constant pressure. It must be placed after any timers or valves in your system.

Features:

• Fits all standard hose bibbs
• High-strength ABS construction for durability
• Inlet: 3/4" FHT
• Outlet: 3/4" MHT
• Maximum operating pressure: 100 PSI
• Includes one pre-installed hose washer (washer color may vary from image)

Special Notes: During normal operation the backflow preventer will appear to "leak" after the system or timer is turned off. This is normal as the backflow preventer is allowing water to drain from the system without entering the water supply. The amount of water drained will be equal to or less than the water capacity of the drip system. For optimal operation the backflow preventer should be installed higher than the emitters.

Garden Hose Threads ( GHT , FHT , MHT ) create a water-tight seal by using a flexible washer between the two connection pieces. Thread seal tape is not recommended since it can inhibit the full threading together of the pieces, thus not allowing a tight, leak-proof seal. GHT are not compatible with NPT or IPT/IPS fittings commonly found in iron pipe or PVC water systems.