To measure a sink faucet aerator, you need to determine its type (male or female thread) and then carefully measure the diameter of the threads.
Understanding Aerator Types
Before measuring, identify whether your aerator has a male or female thread:
- Male Thread: The threads are on the outside of the aerator itself. The aerator screws into the faucet spout. You'll see it seated inside the tap opening.
- Female Thread: The threads are on the inside of the aerator body. The aerator screws onto the threaded end of the faucet spout. It unscrews from the outside of the faucet opening.
This is important because the method of removal and the threads you measure depend on the type.
The Measurement Process
Once you have removed the aerator (using an aerator key or pliers, if necessary), you can measure it.
- Identify the Threads: Locate the metal or plastic threads that screw into or onto the faucet.
- Use a Ruler or Caliper: As per the provided reference, use a ruler to measure the diameter of the thread precisely across the centre of the aerator. A caliper provides a more accurate measurement if available, but a ruler is sufficient for a close estimate.
- Measure the Diameter: Place the ruler or caliper across the widest part of the threads, from one side to the exact opposite side, ensuring you are measuring straight across the center. This measures the outer diameter of the threads.
- Note the Measurement: Record the measurement, typically in inches or millimeters.
What Your Measurement Tells You
The measured diameter corresponds to standard aerator sizes. Common sizes include:
- Male (M): 15/16 inch (M24), 13/16 inch (M22)
- Female (F): 55/64 inch (F22), 13/16 inch (F20)
Comparing your measurement to a chart of standard sizes helps you find the correct replacement aerator.
Quick Measurement Summary
| Step | Action | Tool | Notes |
|---|---|---|---|
| 1. Remove Aerator | Unscrew from faucet (inside for male, outside for female) | Hand/Tool | Note thread location (male vs. female) |
| 2. Locate Threads | Identify the screw threads on the aerator | Eye | Where it connects to the faucet |
| 3. Measure Diameter | Measure straight across the threads through the center | Ruler/Caliper | Precisely across the widest point |
| 4. Record Size | Note the measured diameter (inches or mm) | Notepad | For finding a replacement |
By following these steps, you can accurately measure your sink faucet aerator to ensure you get the correct replacement size.
