Dripping tap cartridge replacement but problem eventually returns

[Ivington]

I have a dripping tap that was getting progressively worse over the period of about 4 to 6 weeks and have replaced with a brand new cartridge on 2 separate occasions, but after 4 to 6 weeks the problem returns.

 

[Deleted member 120897]

What type of tap? Is there a make and model? What type of hot and cold system do you have?