Rain Bird PRF100RBY - 1 in. Pressure-Regulating Filter (RBY)

Build your drip irrigation head assembly safely and quickly.

Step 1: Prep the Threads
Because this unit utilizes Male Pipe Threads (MPT), you must apply 2 to 3 wraps of Teflon tape to both the inlet and outlet threads to ensure a watertight seal. Do not use liquid pipe dope.

Step 2: Attach to Your Valve
Thread the inlet of the Rain Bird PRF unit directly into the downstream side (outlet) of your automated 1" irrigation valve. Ensure the directional flow arrow on the body points downstream.

Step 3: Add a Tubing Adapter
Thread a 1" Female Pipe Thread (FPT) tubing adapter or PVC fitting onto the outlet of the PRF unit to easily transition into your poly mainline.

Step 4: Routine Cleaning
Periodically (once a month) turn off the water supply, unscrew the PRF canister cap, carefully slide the 200-mesh screen out, and rinse it under clean water to remove trapped sediment.

Can I leave this combo unit under constant pressure?
No, the Rain Bird PRF-100-RBY is not rated for constant pressure. It must 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 it pressurized 24/7, which can eventually cause the canister body to stretch, crack, or leak over time.

What does the 200-mesh screen do?
The 200-mesh screen is a very fine filter (equivalent to 75 microns) designed to trap tiny particles of dirt, sand, and rust. It provides superior protection, preventing even the smallest low-flow drip emitters and micro-sprays from clogging.

Regular cleaning of this screen ensures your system maintains its 3-15 GPM flow capacity.

Will this work if my water flow is less than 3 GPM?
For the pressure regulator inside the PRF-100-RBY to accurately step the pressure down to 40 PSI, the system requires a minimum flow of 3 Gallons Per Minute (180 GPH).

If your drip zone uses fewer emitters and draws less than 3 GPM, the regulator may not engage correctly, allowing higher pressure water into your drip lines. For tiny zones, consider using a smaller 3/4" regulator instead.

How should I prepare my Rain Bird filter for winter?
Before the first freeze, ensure all water is drained from the system. We highly recommend unscrewing the canister cap, removing the screen, and storing the cap and screen indoors for the winter.

Leaving trapped water inside the rigid plastic canister during freezing temperatures will cause the housing to expand and permanently crack.