Size

1-in. FPT 100 Series w/Flow Control & 3/4-in. Reducer

3/4-in. FPT 100 Series w/Flow Control

1-in. FPT 100 Series w/Flow Control

3/4-in. FPT Jar Top

3/4-in. FPT Brass w/Flow Control

For controlling the flow of water while also protecting a culinary water system
Combines a 24 VAC automatic valve with an atmospheric vacuum breaker
Atmospheric vacuum breaker features a reliable poppet and seal design
Valve features a 24 VAC solenoid, manual actuation lever, and flow control
Internal scrubber filter helps keep the valve clog-free from dirty water
Compatible with controllers from Orbit, Hydro-Rain, and other major brands
Control with a B-hyve smart controller for optimum water conservation

DOWNLOAD THE DIGITAL MANUAL FOR PN 57604, 57623, 57624, 57625, 57821, 57823, 57824, 91112 HERE

In stock, ready to ship
Inventory on the way

$21.79

Shipping calculated at checkout.

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Description

The automatic anti-siphon valve features a combination of an inline forward flow valve and an atmospheric vacuum breaker which prevents water flowing from the irrigation system back into the culinary system. This type of valve is most common in California. In other states it is common for a single backflow prevention device to protect the entire system at the mainline point of connection. To function properly, an anti-siphon valve should be installed at least 6 in. above the highest head in the zone which it controls. This typically requires the anti-siphon valve to be installed above-ground on risers. The atmospheric vacuum breaker features a reliable poppet design which closes when the valve shuts off. The automatic valve features a 24 VAC solenoid, manual actuation lever, and flow control. An internal scrubber filter helps keep the valve clog-free. The solenoid features nickel-plated copper wire and is compatible with all major brands of 24 VAC irrigation controllers. We recommend B-hyve controllers for optimum water conservation and PVC-Lock fittings for fast, glue-free installation. For outdoor irrigation use with cold water only.

Orbit Anti-Siphon Valve Product Guide

Choose the Right Anti-Siphon Valve for Your System

Name: Automatic Anti-Siphon Valves
Brand: Orbit
SKU: 57604
Price: 21.79 USD
Availability: InStock

Professional backflow protection with reliable performance across premium brass, mid-grade, and value options

📏 Critical Sizing Information - Read Before Ordering

Port spacing and threading differ between models. Measure your existing system carefully to ensure compatibility:

Brass Anti-Siphon (57065)

✦ Port Spacing: 2.6" on center

✦ Threading: 3/4"-14 NPT

✦ Includes: 1.25"-16 UN converter

100-Series (57623, 57624, 57604)

✦ Port Spacing: 3.18" on center

✦ 57623: 3/4" inlet

✦ 57624: 1" inlet

✦ 57604: 1" inlet with 3/4" bushings

Jar-Top (57626)

✦ Port Spacing: 3.95" on center

✦ Threading: 3/4" inlet

✦ Mason jar-style top (no screws)

⚠️ Three different port spacings: 2.6", 3.18", and 3.95". Valves are NOT interchangeable. Verify measurements before ordering to avoid returns.

Complete Specifications Comparison

Compare all models side-by-side to find the perfect valve for your irrigation needs

Specification	Brass Anti-Siphon 57065	100-Series 57623 (3/4")	100-Series 57624 (1")	100-Series 57604 (1")	Jar-Top 57626
Product Tier	PREMIUM	MID-GRADE	MID-GRADE	MID-GRADE	VALUE
Material	Heavy-Duty Brass	Glass-Filled Polypropylene	Glass-Filled Polypropylene	Glass-Filled Polypropylene	Glass-Filled Polypropylene
Port Spacing	2.6" on center	3.18" on center	3.18" on center	3.18" on center	3.95" on center
Inlet Size	3/4" (3/4"-14 NPT)	3/4"	1"	1" (includes 3/4" bushings)	3/4"
Flow Rate	5-22 GPM	5-22 GPM	15-25 GPM	15-25 GPM	5-22 GPM
Working Pressure	125 PSI	100 PSI	100 PSI	100 PSI	80 PSI
Recommended Pressure	80 PSI	80 PSI	80 PSI	80 PSI	65 PSI
Surge Pressure	500 PSI (burst test)	125 PSI	125 PSI	125 PSI	125 PSI
Top Design	8 screws (most secure)	8 screws	8 screws	8 screws	Jar-top twist (no screws)
Solenoid	24 VAC (nickel-plated copper)	24 VAC	24 VAC	24 VAC	24 VAC
Features	Flow control, manual lever, internal filter, includes converter valve	Flow control, manual lever, internal filter	Flow control, manual lever, internal filter	Flow control, manual lever, internal filter, 3/4" adapter bushings	Flow control, manual lever, bleed screw
Life Cycle	10,000 cycles tested	10,000 cycles tested	10,000 cycles tested	10,000 cycles tested	10,000 cycles tested
Best For	High-pressure systems, maximum durability, 2.6" spacing	Standard residential systems, 3.18" spacing	Higher flow zones, 3.18" spacing	Flexible 3/4" or 1" installation, 3.18" spacing	Easy maintenance access, lower pressure systems, 3.95" spacing

Shared Features Across All Models

Every valve includes professional-grade backflow protection and reliable automation

Backflow Protection

Atmospheric vacuum breaker with reliable poppet design
Prevents contamination of culinary water supply
Meets California backflow prevention requirements
Must be installed 6" above highest sprinkler head

Automatic Control

24 VAC solenoid compatible with all major controllers
Manual actuation lever for testing and override
Precision flow control for water management
Works with smart irrigation systems

Built to Last

Tested for 10,000 operational cycles
Operates in temperatures from 40°F to 110°F
Internal filter helps prevent clogging (except jar-top)
Field-serviceable with replacement parts available

Installation Guide for DIY Success

About the 57604 Bushings

The 57604 includes adapter bushings that allow you to connect 3/4" pipes to the 1" valve inlet. This gives you flexibility to use the higher flow capacity of a 1" valve with your existing 3/4" piping. Simply thread the bushing into the valve inlet before connecting your pipe.

Measure & Verify

Measure existing port spacing (2.6", 3.18", or 3.95" on center) and verify threading size. Double-check your system's pressure rating.

Position Correctly

Install valve at least 6 inches above the highest sprinkler head in the zone for proper anti-siphon function.

Secure Connections

Apply pipe sealant to threaded connections. For 57604, install bushings first if using 3/4" pipes. Hand-tighten, then wrench-tighten carefully.

Wire & Test

Connect 24V AC control wires to solenoid. Test manual operation first, then automatic function. Adjust flow control as needed.

Pressure Guidelines

Brass (57065): Can handle up to 125 PSI, recommended 80 PSI
100-Series (57623, 57624, 57604): Max 100 PSI continuous, recommended 80 PSI. Can handle brief surges to 125 PSI.
Jar-Top (57626): Max 80 PSI continuous, recommended 65 PSI. The twist-top design requires lower pressure than screw-secured models.

would have gave 5 but had to pay for shipping

would gave 5 but had to pay for shipping.

the on off valve breaks

I replaced 9 anti siphon valves about 4 years ago and this year I had to replace 4 of them because the on off valve keeps breaking and then the valve leaks.

Thank you for letting us know about your experience with our Anti-Siphon Valves leaking and the on/off lever breaking. We're glad to know how our Customer Care team was able to help with your product replacements, and ask that you reach back out to us with any other concerns you may have or if further assistance may be needed in the future. Have a great rest of your day.

Replaced one after 1

Replaced one after 1.5 years that leaked from one side. New seems fine.

Part needed....

Needed a small replacement part for a 3/4" anti-siphon valve that was under warranty. Orbit did not have the part ( I'm assuming) so they shipped me an entire valve

3/4 in FPT 100 Series Anti-Siphon Valve

This was a warranty replacement. The process was smooth and very easy to complete. The valve was shipped and received very quickly.

Automatic Anti-Siphon Valves