Dosatron In-Line Filter Kit w/ Unions – 200 Mesh / 80 Micron

The Dosatron In-Line Filter Kit with Unions is a cleanable inline filtration assembly designed for use with Dosatron proportional dosing injectors and general irrigation lines. It includes a 200 mesh / 80 micron stainless steel screen element and 3/4 in FPT union connectors, letting you isolate and clean the filter without dismantling your irrigation plumbing. The body is made of polypropylene for chemical resistance in nutrient-solution environments.

Dosatron In-Line Filter Kit Specifications

Specification	Value
Filter Mesh Rating	200 mesh
Micron Rating	80 micron
Filter Element Material	Stainless steel (cleanable)
Body Material	Polypropylene
Inlet / Outlet Connection	3/4 in FPT (female pipe thread) with union fittings
Replacement Cartridges Required	No — screen is cleanable and reusable
Weight	0.75 lb (0.34 kg)

Why Choose This In-Line Filter Kit

The core reason to choose this kit over a bare filter is the union fittings. The 3/4 in FPT union connectors allow you to uncouple the filter body from the line in seconds — without cutting tubing or unthreading adjacent fittings. For growers running Dosatron injectors on a continuous fertigation system, that means a routine screen cleaning takes a few minutes rather than a plumbing job.

The 200 mesh / 80 micron stainless steel screen catches sediment, particulate matter, and debris that would otherwise clog Dosatron injector check valves or emitter orifices. Because the screen is stainless steel and physically cleanable, there are no replacement cartridge costs over time — rinse the screen under water, inspect it, and reinstall. This lowers the ongoing cost of maintaining inline filtration in a permanent or semi-permanent irrigation setup.

The polypropylene housing is chemically compatible with the nutrient solutions, pH adjusters, and dilute hydrogen peroxide concentrations commonly used in recirculating and drip-irrigation systems. It handles both water and water-soluble concentrate lines without degrading under normal operating conditions.

• Union fittings included: 3/4 in FPT unions let you remove the filter body without dismantling the surrounding plumbing.
• Cleanable stainless screen: 200 mesh / 80 micron element is rinsed and reused — no cartridge replacements needed.
• Polypropylene body: chemically resistant to nutrient solutions and common irrigation additives.
• Protects downstream equipment: keeps sediment out of injector check valves and drip emitters.
• Lightweight assembly: at 0.75 lb total, it adds minimal weight and stress to the supply line.

Best Uses for the Dosatron In-Line Filter Kit

This filter kit is sized and threaded for direct installation on 3/4 in supply lines — a common size in commercial and hobbyist grow operations. The following applications are where it provides the most value:

• Upstream of Dosatron injectors: Dosatron recommends inline filtration before the injector inlet to prevent particulate from damaging internal seals and check valves. The 200 mesh / 80 micron rating is appropriate for this use.
• Drip and micro-irrigation systems: protects emitters and dripper stakes from clogging by sediment in source water or concentrated nutrients. Particularly useful when using well water or surface water with higher particle loads.
• Nutrient dosing lines: installed between the main supply and a nutrient injector to keep the injector body free of scale and debris.
• Greenhouse fertigation headers: placed at the branch point of a main supply line to protect an entire irrigation zone without requiring separate filters at each emitter.
• Reverse osmosis post-filter protection: used after an RO unit to catch any carbon fines or membrane particulate before they reach sensitive downstream equipment. If you’re running a compact RO system in your grow room, adding an inline filter downstream is straightforward with this kit.
• Indoor and outdoor irrigation setups: the polypropylene body tolerates both indoor ambient temperatures and outdoor conditions within normal agricultural use ranges.

Compatibility

The filter kit connects via 3/4 in FPT (female pipe thread) unions on both the inlet and outlet. Standard 3/4 in MPT (male pipe thread) fittings or barbed adapters thread directly into the unions. It is compatible with:

• Dosatron injectors: all Dosatron models with 3/4 in line connections, including the D14MZ2, D25RE2, and comparable injectors in the Dilution Solutions line. Inline filtration is a standard recommendation for all Dosatron installations.
• 3/4 in supply lines: works with CPVC, PVC, polyethylene, and flexible tubing via appropriate MPT adapters or barb-to-thread adapters.
• Standard irrigation hardware: fits into any plumbing run that uses 3/4 in threaded connections, including ball valves, solenoid valves, and manifold tees.
• Water temperatures and chemistry: polypropylene is suitable for cold and warm water lines and resistant to dilute nutrient solutions and common pH adjusters (citric acid, phosphoric acid, potassium hydroxide). It is not rated for steam or temperatures above approximately 80 °C (176 °F) under pressure.

For growers monitoring water quality downstream of this filter, pairing it with an EC calibration kit ensures your conductivity meter stays accurate when tracking filtered nutrient solution strength.

If you need filtration at a larger pipe diameter, the Dilution Solutions 1-1/2 in filter with 200 mesh screen is the same screen specification in a larger body for higher-flow main lines.

Sources & Further Reading