Alb Filter Thread Guide

In this manual we will introduce you to various methods for determining the thread size of your valve. We know that even the best methods can lead to errors, so please do not hesitate to contact our support if you have any questions or problems. Your Alb Filter Team wishes you a lot of fun in determining your thread.

Free exchange service of the standard M24 adapter

Free adapter exchange

It is best to determine your tap thread before buying the Alb Filter Duo.

If you need a different adapter than the M24 adapter included in the scope of delivery, we will exchange it after consultation with you.

Please send us an e-mail after your order with the required adapter and your order or order number.

Which methods can I use to determine a thread?

+ + + Very precise (recommendationhlen)

Thread dimensions at a glance

Have you measured your thread yet? Here you will find an overview of the common dimensions.
If your design is not listed please contact us!

Preparation

Remove aerator / jet controller

Most water taps have a jet regulator, also called aerator. To determine the thread, we have to unscrew it.

Unscrew the aerator / jet regulator from the water tap

Thread Determine output drive type

External thread

An external thread is when the serration,
as in this illustration, faces outwards.

The thread is always measured at the outer edge of the serration.

Sketch external thread
Internal thread

An internal thread is when the serration points to the inside.

The thread is always measured at the inner edge of the serration.

Sketch internal thread

How do I measure a thread?

Caliper gauge (analog / digital)

Determination of an external thread (AG)

The thread is measured at the outer edge of the serration. To do this, position the caliper gauge as shown in the following figure and read off the value.

Digital caliper gauge for determining thread sizes for water filters on the tap
Determination of an internal thread (IG)

The thread is measured at the inner edge of the serration. To do this, position the caliper gauge as shown in the following figure and read off the mm value.

Analogue caliper gauge for determining thread sizes for water filters at the tap

Measurement method

Ruler / measuring tape

Determination of an external thread (AG)

Place the zero value of the ruler on the outer edge of the serration. Now read the mm value on the opposite side of the thread.

NOTE: The external thread makes it easier to determine an AG with the ruler than an IG.

Aerator / jet regulator Measuring external threads with the aid of a ruler
Determination of an internal thread (IG)

Place the zero value of the ruler on the inner edge of the serration. Now read the mm value on the opposite side of the thread.

Aerator / jet regulator Measuring internal threads with the aid of a ruler

Measurement method

Euro coin comparison

Determination of an external thread (AG)

Place the coins on the outer edge of the serration. Compare the position of the coin in the following illustrations.

The thread gradations are partly very small (0.5mm). If a thread cannot be determined exactly, try one of the other methods described or contact our support.

Determine the thread by means of a coin test for water filters on the tap
Determination of an internal thread (IG)

Insert the coin into the thread at a right angle until it stops. Make sure that the "scale" (see figure) is parallel to the lower edge of the thread.

The larger the thread, the deeper the coin sinks into it. If the coin cannot sink in completely, it is better to measure the opposite side (external thread).

The "scale" on euro coins makes it easy to compare the threads.

Determining threads by means of a coin test using the example of M18 and M19 threads

Euro coin comparison

External thread

Sketch external thread
External thread M16
M16 male thread with dimensions
M16 thread adapter in comparison with EURO CENT coins. External thread
Male thread M16.5

*The difference to M16 is only about 0.4 mm. Let us advise you!

M16.5 male thread with dimensions
M16.5 thread adapter in comparison with EURO CENT coins. External thread
External thread M18
M18 male thread with dimensions
M18 thread adapter in comparison with EURO CENT coins. External thread
External thread M20
M20 male thread with dimensions
M20 thread adapter in comparison with EURO CENT coins. External thread
External thread M21
M21 male thread with dimensions
M21 thread adapter in comparison with EURO CENT coins. External thread
External thread M21.5

*The difference to M21 is only about 0.4 mm. Let us advise you!

M21.5 male thread with dimensions
M21.5 thread adapter in comparison with EURO CENT coins. External thread
External thread M22
M22 male thread with dimensions
M22 thread adapter in comparison with EURO CENT coins. External thread
External thread M24
M24 male thread with dimensions
M24 thread adapter in comparison with EURO CENT coins. External thread

Euro coin comparison

Internal thread

Sketch internal thread
Internal thread M16
M16 female thread with dimensions
M16 thread adapter in comparison with EURO CENT coins. Internal thread
Internal thread M16.5
M16.5 female thread with dimensions
M16.5 thread adapter in comparison with EURO CENT coins. Internal thread
Internal thread M18
M18 female thread with dimensions
M18 thread adapter in comparison with EURO CENT coins. Internal thread
Internal thread M18.5
M18.5 female thread with dimensions
M18.5 thread adapter in comparison with EURO CENT coins. Internal thread
Internal thread M20
M20 female thread with dimensions
M20 thread adapter in comparison with EURO coins. Internal thread
Internal thread M21.5
M21.5 female thread with dimensions
M21.5 thread adapter in comparison with EURO coins. Internal thread
Internal thread M22
M22 female thread with dimensions
M22 thread adapter in comparison with EURO coins. Internal thread
Internal thread M24
M24 female thread with dimensions
M24 thread adapter in comparison with EURO coins. Internal thread

Here you get support!

We are also happy to help you by phone or even more conveniently via our WhatsApp Chat Service. Photograph your tap aerator / aerator with the measuring tape, ruler or caliper attached.

(+49) 7420 920 921 0

Alternatively, you can of course also contact us by e-mail or via our contact form.