Orbit 51016 3/4 Inch FPT Brass Manual Anti-Siphon Sprinkler Valve | Outdoor Irrigation

Overview

The Orbit 51016 Brass Manual Anti-Siphon Valve combines a forward-flow valve with an atmospheric vacuum break to help prevent backflow into any culinary or household lines. Built with a heavy-cast brass body, this valve is designed for outdoor irrigation projects using cold water. It supports precise flow adjustments through an easy-to-rotate handle, giving you reliable control where you need it most.

Key Benefits and Real‑Life Use

Ideal for installations common in California and others where separate backflow protection is preferred at the point of connection, this valve helps separate irrigation from indoor water supplies. The inline design works with standard 3/4 inch FPT connections, and its robust construction is built to handle outdoor conditions while you fine-tune watering zones.

• Inline forward flow valve paired with atmospheric vacuum break to reduce backflow risk
• Heavy-cast brass body for durability and consistent flow control
• Outdoor use with cold water only, designed for long-term outdoor exposure
• 3/4 inch FPT connection size for compatibility with common irrigation setups

In practical terms, the valve is often installed above ground on risers to maintain proper elevation. Expect crisp, smooth operation from the flow control handle, which can be adjusted as your irrigation needs shift across seasons. This design supports a predictable watering rhythm without clumsy adjustments at the mainline point.

Installation Tips and How It Fits Your System

• Place the valve at least 12 inches above the highest sprinkler head in the zone you control to ensure proper function
• Consider a steel sprinkler key for hard-to-reach spots and PVC-Lock fittings for faster, glue-free setup
• Use only for outdoor irrigation with cold water to match the valve’s intended use

These guidelines help you prepare a clean, maintainable installation that supports system separation where required by local codes, while keeping water flow predictable and adjustable.

Why Choose Orbit

Orbit’s brass anti-siphon valve is designed to minimize contaminants entering the household supply by providing a controlled, isolated outlet for irrigation. The combination of a precise flow-control mechanism and a sturdy brass body is built to withstand outdoor weather and repeated use, offering a practical, non‑critical solution for backflow prevention in compatible irrigation setups.