Hunter ¾” Filter 150 mesh with stainless steel screen

Build your drip irrigation head assembly safely and effectively.

Step 1: Prep the Threads
Because this filter utilizes standard pipe threads, you must apply 2 to 3 wraps of Teflon tape to both the inlet and outlet threads to ensure a watertight seal. Avoid using liquid pipe dope.

Step 2: Attach to Your Valve
Thread the inlet of the Hunter filter directly into the downstream side (outlet) of your automated AC or DC irrigation valve. Ensure the filter is positioned so the directional flow arrow points downstream toward the plants.

Step 3: Add a Pressure Regulator
Thread a compatible 3/4" pipe-threaded pressure regulator onto the outlet of the filter, followed by your PVC fitting or tubing adapter to transition into your mainline.

Step 4: Routine Maintenance
Periodically (once a month) turn off the water supply, completely unscrew the filter canister, remove the stainless steel screen, and rinse it under clean water to remove accumulated dirt and restore full flow.

Can I leave this filter under constant pressure?
No, this filter is generally not recommended for constant pressure applications. It should be installed after your automated timer or irrigation valve so it only holds pressure when the system is actively watering.

Installing it before the valve leaves the plastic housing pressurized 24/7, which can eventually cause it to stress, crack, or leak.

What is the difference between 150 mesh and other screen sizes?
The mesh number refers to the number of holes per square inch. A 150-mesh screen (equivalent to 100 microns) is very fine and is specifically recommended for protecting highly sensitive drip emitters and micro-sprayers.

It catches significantly smaller particles of sand and silt than standard 120-mesh or 80-mesh filters.

What type of water is this filter best for?
This screen filter is ideal for fairly clean water sources, such as municipal city water or clean residential wells.

If you are pumping water with heavy algae, significant organic matter, or severe silt from a pond or ditch, you will need to upgrade to a much larger disc filter to prevent rapid, daily clogging.

How should I prepare my Hunter filter for spring watering?
As you set up your system for spring, unscrew the canister and inspect the 150-mesh stainless steel screen for any winter scale, damage, or holes.

Clean the screen thoroughly with a soft brush, ensure the internal O-ring is properly seated and lubricated, and hand-tighten the canister back on. Turn the system on to flush the lines once before reattaching your downstream drip tubing.