How to take out mixer cartridge - urgent help needed!

[zaruljica]

How can I take out this cartridge:

Please, please, nobody knows and system is really unusual. What tool should I use and what to do??? Please! Thanks!

 

[Terry H]

If I’m seeing it correctly there are 4 prongs that probably screw off. I’ve had to use screwdrivers and a hammer and slowly and easily tap to get it broke loose and then some needle nose would probably work getting it the rest of the way.

Sometimes you have to improvise but be careful using any method like that. For example if your round the delta bonnet nut for the shower valves you’ll be hunting a new one.

That is my first impression but one I’d proceed with caution on.