How to change under sink valves?

Question

I have 2 under sink valves for hot n cold. Flexi hose connected to my gooseneck tap. In the cold valve there is also a hole for my ro water filter. I want to replace this cold valve but don't know where to buy that particular valve. It is actually a 3 way as it has this tiny hole for the inline water filter. Would you have this and what is name and item no. Please see photos. Photos will show the flexi hose and the white tube for water filter. The connection to the main water supply is hidden in photo but it is st the back of that valve. Please see photos. After buying the valve can I get my handyman to change it. Would you have steps please. Do I need to get a plumber? My handyman is charging a fraction of the cost and tells me he can do it. Please advise Thanks

JacobZ · Answer

Hi @marlie,

Please note that plumbing work must be carried out by a licenced plumber for safety and compliance reasons.

Unfortunately, I am not aware of the particular plumbing fitting that was used in this situation. I suspect it is likely proprietary to the particular filtration system that was installed.

I'd suggest it is best to contact a plumber for assistance with this, and more specifically a plumber that does work with home filtration systems as a standard plumber may not be aware of the part.

Apologies that I can't be more help.

Jacob