Servo Water Valve For Irrigation and Flow Control
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An MG995/996 Servo is used to control an Antelco shutoff valve on 1/2" or 14-16mm irrigation lines or hoses.
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- Printables
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- Outdoor & Garden
- Licencja
- Creative Commons — Public Domain
This 3D-printed mount system allows you to automate an Antelco manual irrigation valve using a standard MG995 or MG996 servo. It’s an ideal low-cost solution for DIY and smart IoT irrigation projects. Great for a rain-barrel garden irrigation project. For gardening, use an adapter to convert your hose or faucet to ½ irrigation tubing, and you are ready to automate your smart watering project with an Arduino, ESP32, etc.
🔗 Valve product link:
Antelco Manual Valve (Drip Depot)
💡 Features
Compatible with 14mm, 16mm, and ½-inch Antelco barb valves
No supports required when printed correctly (see printing tips below)
Fits MG995 or MG996 servo motors
Press-fit coupler attaches to the valve handle— valve not damaged, can be reclaimed.
Uses standard M3 x 20mm bolts for assembly
Designed with low-power IoT applications in mind: servo can be disconnected after actuation to mimic a latching valve
🖨 Printing Recommendations
Material: PLA or PETG
No supports needed
Important: Rotate the coupler onto its edge (on the build plate) before slicing to ensure clean printing without supports
⚙ Assembly Instructions
Attach the dual servo horn to the printed coupler with two screws supplied with servo.
Press-fit the valve handle into the coupler—no adhesive required.
Attach the coupler to the servo output shaft/spline (see notes on alignment below).
Place the assembled valve and servo into the holder.
Secure using M3x20 bolts. Note: bolts for one side of the servo insert from the back—see posted photos for guidance.
⚡ Power Tips
Servo startup current may briefly exceed 500mA @ 5V.
Use an adequate power supply and capacitor to prevent brownouts.
For ultra-low-power builds, disconnect servo power when inactive using a load switch, MOSFET, etc.
🔧 Calibration
Before final assembly, use a simple sketch like Sweep.ino to test valve range and servo alignment:
Sweeping to 0° opens the valve, and sweeping to 90° closes it, but confirm for your specific build.
🔗 See Also
For a similar design adapted to smaller tubing, check out:
Servo Ball Valve for Drip Irrigation (Printables)