Orbit 57280 3/4 inch FPT L-Series Automatic Sprinkler Valve | Inline 24 VAC

Orbit L-Series 3/4 inch FPT Automatic Sprinkler Valve

The Orbit L-Series inline valve, model 57280, is designed for reliable residential irrigation with 3/4 in. female pipe thread connections on both ends. It slots into Orbit heavy-duty preassembled manifolds and many compatible inline setups. This valve uses 3/4 in FPT threads and is not compatible with standard garden hose threads. If your system requires 1 in. FPT, model 57281 is the appropriate option. When replacing an older green Orbit valve, note that the L-Series body is slightly shorter; you may need a short pipe extension to bridge the difference during in-ground installation.

The valve blends straightforward manual control with dependable automated operation. The 24 VAC solenoid is compatible with most irrigation controllers, and manual actuation is possible with a quick quarter turn. A field-replaceable solenoid means you can swap components without removing the valve body. An internal scrubber filter helps keep the diaphragm clear from sediment, and four captured screws in the lid stay in place during service for easy maintenance. The unit is rated up to 120 PSI, making it suitable for a variety of residential installations.

Soft-close and fail-safe operation

A soft-close design minimizes water hammer during valve operation, promoting smoother starts and stops in your zones. If power is lost, the valve closes as a fail-safe, reducing the risk of unintended flooding and conserving water in sensitive areas.

Durable construction and compatibility

Constructed from PVC, the L-Series valve is built for outdoor use in cold-water environments. It serves as a direct replacement in Orbit’s heavy-duty preassembled manifolds and remains compatible with controllers from Orbit, Hydro-Rain, and other major brands. For enhanced irrigation efficiency, you can pair it with a smart controller to optimize schedules.

Installation notes and tips

Outdoor installations should use cold water only. If you’re upgrading from an older green Orbit valve, anticipate a slightly shorter body with the L-Series and plan for a short pipe extension to bridge the difference in-ground. The 24 VAC solenoid supports straightforward testing and maintenance, and the internal design helps minimize leaks during service.

Why choose Orbit L-Series 57280?

• 3/4 in. FPT connections on both ends for versatile inline installation
• 24 VAC solenoid with simple manual actuation for quick testing
• Internal scrubber filter and four captured screws for clog-free operation and easy service
• Soft-close design reduces water hammer; fail-safe closure protects zones during power loss
• Durable PVC construction and compatibility with major brands and Orbit manifolds

Key specs at a glance

• 3/4 in female pipe thread on both ends
• 24 VAC solenoid; field-replaceable
• Internal scrubber filter; four captured screws
• Rated up to 120 PSI; cold water outdoor use
• Made in the USA with global parts