Adding and Replacing Sprinkler Heads: A Step-by-Step DIY Guide

Modifying an existing irrigation system is manageable for a homeowner with basic tools. Here's a practical walkthrough.

Replacing Existing Heads

1. Turn off the controller (not the main water).
2. Flag the heads to change.
3. Dig 6–8 inches around each head to expose the connection.
4. Heads screw into a ½" or ¾" fitting on either a rigid riser or flexible swing pipe.
5. Unscrew the old head. Expect some drainage, air intake, or nothing—depends on elevation.
6. Critical: Keep dirt out of the open line. On low heads, dig a deeper sump hole to catch drainage.
7. Wrap male threads with Teflon tape (optional but recommended).
8. Screw in the new head, set flush with grade, pack soil, and adjust arc per manufacturer instructions (right/left stops mainly for rotors).

Adding New Heads

1. Tap into the nearest existing head's supply line.
2. If on swing pipe (½" flexible hose): cut, insert a barbed tee, run new swing pipe to the new head location. Test before burying—pressure may not support two heads on one swing line.
3. If on 1" poly lateral: use a poly saddle tee (easier) or PVC glue saddle (for white PVC). Saddle tees leak less if clamped tightly.
4. Install the new head on swing pipe at the end of the run.
5. Test the zone. Verify coverage and pressure. Adjust or reduce nozzle size if needed.

Tools & Parts

You'll need a pipe cutter, saddle installation tool, barbed fittings, swing pipe, and Teflon tape. Your local irrigation supply can kit you out based on your pipe type.