The SMR coding does not identify the size.

Tap Magician compatible replacement for the SMR stamped valve which has 20 teeth, measures 51mm tall and has a threaded collar.
If this specification does not match your own cartridge Click here to view the other SMR coded cartridges

This cartridge is known by 1212R SP1212-C SP1212-H 3984R 3894R SP3894 SP3984, 1212, 1453, SMR1453, 1454, SMR1454, 133.0069.960, 133.0069.959, 133.0440.351, 133.0440.352, 133.0440.351, 1330440351 1212R-C,1212R-H.

If you are still not sure which model you have please send us a photograph and we will identify this for you.

If your kitchen mixer tap is dripping or leaking out of the spout it is time to change/ replace the internal ceramic disc cartridges (known by tap valve, tap insert, tap gland).
Cartridge is quarter turn BSP 1/2".

This cartridge may come out attached to an adaptor bush. The bush is a separate part.
There are two types of bush used on this cartridge so you will need to measure the thread on the bush.
This may be 28mm which is our SB28 (3409R SP3409 133.0069.390) or 34mm thread which is our SB34 (SP3408 3408R 133.0069.391).
You can try and separate your cartridge from the bush.
If you are struggling to remove your old bush it may be corroded on and you will need to purchase a new bush.

How can I remove my handle? is it easy to replace my cartridge myself?
Watch our how to video for guidance on removing tap handles and replacing tap cartridges and removing an adaptor bush.

1330440352,3894R,SP3894,SP3984 06/08, 07/08, 08/08, 09/08, 10/08, 11/08, 12/08, 01/10 02/10, 03/10, 04/10, 05/10, 06/10, 07/10, 08/10, 09/10, 10/10, 11/10, 12/10, 01/11, 02/11, 03/11, 04/11, 05/11, 06/11, 07/11, 08/11, 09/11, 10/11, 11/11, 12/11, 01/12, 02/12, 03/12, 04/12, 05/12, 06/12, 07/12, 08/12, 09/12, 10/12, 11/12, 12/12, 01/13, 02/13, 03/13, 04/13, 05/13, 06/13, 07/13, 08/13, 09/13, 10/13, 11/13, 12/13, 01/14, 02/14, 03/14, 04/14, 05/14, 06/14, 07/14, 08/14, 09/14, 10/14, 11/14, 12/14, 01/15,02 /15, 03/15, 04/15, 05/15, 06/15, 07/15, 08/15, 09/15, 10/15, 11/15, 12/15, 01/16, 02/16, 03/16, 04/16, 05/16, 06/16, 07/16, 08/16, 09/16, 10/16, 11/16, 12/16, 01/17, 02/17, 03/17, 04/17, 05/17, 06/17, 07/17, 08/17, 09/17, 10/17, 11/17, 12/17, 01/18, 02/18, 03/18, 04/18, 05/18, 06/18, 07/18, 08/18, 09/18, 10/18, 11/18, 12/18, 01/19, 02/19, 03/19, 04/19, 05/19, 06/19, 07/19, 08/19, 09/19, 10/19, 11/19, 12/19, 01/20, 02/20, 03/20, 04/20, 05/20, 06/20, 07/20, 08/20, 09/20, 10/20, 11/20, 12/20 01/21 02/21 03/21 04/21 05/21 06/21 07/21 08/21 09/21 10/21 11/21 12/21 01/22 02/22 03/22 04/22 05/22 06/22 07/22 08/22 09/22 10/22 11/22 12/22, 01/23, 02/23, 03/23, 04/23, 05/23 San Marco 2004, 2005, 2006, 2007, 2008, 2009,2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2023 MS WRAS

SMR 20-31 34mm Bush T20-44A+31B,20-2 28mm Bush T20-44A+28B, San Marco SMR 20 cw Deep Bush 'F' T20-63/HC36 BS5412 Ceramic Disc Cartridge (pair)