Netafim Guardian Air & Vacuum Relief Vent - 3/4-in - 150 PSI

Protect Irrigation Lines From Vacuum and Trapped Air - 3/4-in

Draining lines can pull a vacuum that collapses pipe or draws soil into drip lines, and trapped air can stress fittings at start-up. This vent discharges air while the system fills, closes as water arrives, and opens again to admit air when pressure drops. Its body is a corrosion-resistant, UV protected composite with no metal parts to rust.

The 3/4-in size suits small to mid-size irrigation and hydroponic water systems, such as a home grower's manifold or a regular indoor cultivation setup. Larger commercial runs may need other sizes, so match the vent to your line size and flow.

Key Features & Benefits

• Air and vacuum relief — lets air out during fill and back in during drain-down to protect pipes.
• Composite construction — corrosion-resistant and UV protected, so it holds up outdoors and in damp rooms.
• 150 PSI rating — suits pressurized irrigation lines within that limit.
• Float-operated closure — the vent seals as water fills the line and stays closed under pressure.
• Low opening pressure — the vent is listed to open at 5 psi.

Who Should Use Netafim Guardian Air & Vacuum Relief Vent

Growers running drip or other pressurized water lines who drain their systems regularly or want to reduce pressure stress at start-up. It fits manifolds, sloped runs and points downstream of valves.

About Netafim Guardian Air & Vacuum Relief Vent

Netafim makes the Guardian line of air vents for irrigation systems. This 3/4-in model uses a composite body, a float mechanism and a 150 PSI rating. It is sold individually.

Frequently Asked Questions

Q: What does an air and vacuum relief vent do?
A: It releases trapped air as a line fills and admits air as the line drains. This prevents vacuum that can collapse pipe or pull soil into drip lines.

Q: Where should I install it?
A: Common spots are downstream of valves at manifolds, on sloping runs, and upstream of valves for air release at start-up. Proper sizing and placement matter for protection.

Q: Will it rust?
A: The body is a corrosion-resistant composite, so it does not rely on metal parts that rust. It is also UV protected for sun exposure.

Q: How does the float work?
A: As water enters, the float rises and closes the vent. When the line empties or pressure drops, the float lowers and opens the vent to admit air.

Q: What is its pressure rating?
A: The rating is 150 PSI. Keep system pressure within that limit.