Step 1: Remove Your Aerator

Most taps come with an aerator. To check the thread size, simply unscrew it.

Step 2: Identify Thread Type

Male (M) – The threading is on the outside of the aerator.

Female (F) – The threading is on the inside of the aerator.

Step 3: Measure The Diameter of Your Aerator

Male (M) Thread– Measure across the outer edges of the aerator.

Female (F) Thread– Measure across the inner edges of the aerator.