Netafim 2" Pressure Regulator (MPT x MPT)

Build your high-flow drip irrigation head assembly safely.

Step 1: Prep the Threads
Because this unit utilizes standard 2" Pipe Threads, you must apply 3 to 4 wraps of Teflon tape to the female PVC fittings you will be threading onto the regulator's inlet and outlet. Do not use liquid pipe dope.

Step 2: Connect the Inlet
Thread a 2" Female Pipe Thread (FPT) fitting from your upstream valve or filter onto the MPT inlet of the Netafim regulator. Crucial: Look closely at the body and ensure the directional flow arrow points downstream toward your fields.

Step 3: Connect the Outlet
Thread a 2" Female Pipe Thread (FPT) PVC fitting or tubing adapter onto the MPT outlet of the regulator to transition safely into your irrigation mainline.

Step 4: Changing Springs (When Needed)
If you need to change your output pressure in the future, simply turn off the water supply, unscrew the large cap on top of the regulator, remove the four existing spring cartridges, drop in the new replacement cartridges, and hand-tighten the cap back on.

How many spring cartridges does this unit use?
Because of its massive 2" size and high flow capacity, this regulator utilizes four (4) individual spring cartridges simultaneously to manage the internal diaphragm.

Four springs are included with the unit. If you ever purchase replacement springs to change your output pressure, you must swap out all four springs at the same time to ensure balanced regulation.

What happens if my flow is less than 22 GPM?
Pressure regulators require a certain volume of water passing through them to accurately engage the internal springs. If your zone draws less than 22 Gallons Per Minute (1,320 GPH), this high-flow regulator will not function properly.

In low-flow scenarios, the pressure will not drop accurately, potentially allowing dangerously high pressure into your drip lines. Always calculate your zone's total GPH before purchasing.

Can I leave this regulator under constant pressure?
No, standard in-line pressure regulators are not rated for constant pressure. They must be installed after an automated timer or irrigation valve so they only hold pressure when the system is actively watering.

Installing them upstream of a closed valve leaves the plastic housing pressurized 24/7, which can eventually cause it to stress, crack, or leak.

How should I prepare my Netafim pressure regulator for spring watering?
Before winter arrives, you must completely blow out or drain all water from your irrigation head assembly. Any water left trapped inside the regulator's body will expand as it turns to ice, which will permanently destroy the internal diaphragm and springs.

When turning the system back on in the spring, it's good practice to unscrew the top cap, inspect the springs for any corrosion or damage, and verify that the large O-ring is properly seated before pressurizing the mainline.