Rain Bird manufactures only the highest quality in-line valves. Use in-line valves in locations where the use of a Pressure Vacuum Breaker (PVB) or a double-check valve is required by city codes to protect against back flow. Check your local city codes to determine what type of valves are required. In-line valves are installed below ground in a valve box down stream from the main line from a PVB or double check valve. In-line valves will not prevent back flow on their own and they need the help of a back flow prevention device.

• 1 in female pipe thread inlet and outlet inline irrigation valve
• Buna-N diaphragm offers great performance in harsh water environments
• Reliable, non-clogging design
• Reverse flow design reduces stress on diaphragm for dependable operation
• In-line design minimizes pressure loss of dirt and debris during installation and system start-up
• Operates automatically or manually with manual bleed screw
• Works with any standard sprinkler timer
• Energy efficient, low power encapsulated solenoid with captured plunger

• https://assets.unilogcorp.com/187/ITEM/DOC/Rain_Bird_100093344_Catalog.pdf Catalog