OMNI Mister Mist'r®

The #1 Injection Check Valve
in the World

To back our position as a leader in fluid injection technology, Agri-Inject® developed the most advanced injection check valve available on the market today. Efficient, consistent fluid injection is essential – and our Mister Mist’r® (U.S. Patent No. 6,230,982) valves deliver where it counts.

Mister Mist’r® serves as a positive two-way check valve to prevent back-flow of water into the system and accidental leakage of chemical into the mainline water stream during shutdown. Mister Mist’r® has been approved as a chemigation check valve by all state and federal regulatory agencies, so you are assured that your Agri-Inject system is in compliance no matter where you are!

Key Features

The four-way spray design

essentially atomizes the injected product and evenly distributes it into the irrigation water flow, compared to our competitor's check valves.

Moving parts are continually cleaned

by moving water, ensuring a long life.

Plastic models

are suitable for use in 6-1 inch diameter piper and can handle volumes of up to 110 gallons per hour

Stainless steel models

are designed for high-volume applications of up to 300 gallons per hour. They are also available for use in a wide range of pipe diameters.


Fertilizer dispersion into
the water flow compared to
competitive injection valves.


Number of directions the Mister
Mist'r injects into the flow of water
resulting in immediate product mxing.

Bleeder Valves

Agri-Inject bleeder valves are versatile and simple. They’re the perfect compliment to the Mister Mist’r® injection check valve! Put the two together to create an unbeatable assembly for controlling and adjusting your chemigation system.

Our bleeder valves are also of value all alone for small-scale irrigation in nurseries or greenhouses.

Provide for easy operation to
release air or fine amounts of
liquid through the port.

Used to bleed air
from injection hoses to aid
in priming pumps.

Used to relieve injection
hose pressure before
disconnecting system.

Attach the provided tube to
direct product away from
you and into a container.

OMNI™ Mister Mist'r®

Common Uses

Injection of virtually any agricultural and/or industrial chemical including Sulfuric Acid and Sodium Hypochlorite (ie. liquid chlorine).

OMNI™ Bleeder Valves

Primary Function

Designed to work with OMNI Mister Mist'r


Available in both Classic and ULTRA body styles, PDVG body, Viton o-ring


Classic Body Type:
Mister Mist'r Connection: 1/4" MNPT
Tubing/Hosing Connection: 1/4" FNPT
Discharge Tubing Connection: 3/16" o.d. x 1/18" i.d.

ULTRA Body Type:
Mister Mist'r Connections: 1/2" FNPT or 1/2" MNPT
Outlet Connections: 1/2"hose barb, 1/2" MNPT
Tubing Connection: 1/4" o.d. x 1/8" i.d.

Common Assemblies

Get a FREE Key for Injection System Maintenance

We recommend you check your system each season prior to irrigation. Fortunately, Agri-Inject has made that process even easier by offering a free “clean key” that features two different key sizes, allowing it to be used on the Classic Mister Mist’r®, Alpha Mister Mist’r®, Omni Mister Mist’r® and Ultra Mister Mist’r® injection valves.

Locate a Dealer!

Agri-Inject products are distributed globally through an authorized dealer network. Each dealer has a solid reputation for responsive service and technical support. When you’re irrigating, you can’t afford to wait for answers. You’ll find the support you need from Agri-Inject is just around the corner.