How to Replace Air/Water Syringe Buttons: A Step-by-Step Guide

Oct 01, 2025

The air/water syringe is one of the most frequently used tools in any dental operatory. Over time, the buttons that control air and water can wear out, get sticky, or stop responding. The good news? Replacing these buttons is a quick and easy fix you can do right in the office.

At KEEL, we provide dental repair services, parts, and training so your team can keep operations running smoothly. Below is a simple guide on how to replace your syringe buttons.

Tools & Materials You’ll Need

Replacement button kit (specific to your syringe model)
Small flathead screwdriver or pick tool
Clean cloth or gauze
Mild disinfectant wipes

Step 1: Prepare the Syringe

Turn off the unit or disconnect the dental chair’s main air/water supply if possible.
Remove the syringe tip and set it aside.
Wipe the syringe body with disinfectant to ensure a clean workspace.

Step 2: Remove the Old Buttons

Locate the button caps (usually two, one for air and one for water).
Using a small screwdriver or pick tool, gently pry the button straight up.
Remove the spring underneath the button. Keep note of how it was positioned—this will help when installing the new button.

Step 3: Clean the Area

With the buttons removed, use a gauze or cloth to wipe away debris or mineral buildup.
Make sure the button housing is clean and free of residue before installing new parts.

Step 4: Install the New Buttons

Place the new spring into the button housing.
Insert the new button cap on top of the spring.
Push down gently until the button snaps securely into place.
Repeat the process for the second button.

Step 5: Test the Syringe

Reconnect the unit or turn the chair supply back on.
Attach a sterile syringe tip.
Press each button individually to confirm that air and water flow correctly.
Test both buttons together to make sure the spray function works.

Pro Tips

Always order OEM-compatible replacement buttons to ensure the best fit.
If buttons are wearing out frequently, check for excessive pressure in your air/water lines—this could shorten button life.
Keep an extra button kit in your supply cabinet for quick fixes.

When to Call a Professional

If your syringe still leaks, buttons stick after replacement, or the body is cracked, it may be time for a complete syringe replacement. KEEL provides on-site repair, replacement syringes, and installation service to keep your practice running without downtime.

That’s it! Replacing air/water syringe buttons usually takes less than 10 minutes. With a small investment in parts and a little know-how, you can keep your operatory working at peak efficiency.