Problems replacing water filter cartridge
Hello everyone, this is my first time posting here.
We have a house water filter that desperately needs to be changed. The type of filter we have can be seen here: http://www.autogeek.net/clinhofianda.html
The problem is, I can't open up the plastic cover to get to the cartridge. I use the plastic circular wrench, and it won't budge an inch even when I put all of my force into it. I've never changed this filter since I'm new to this house, but the person who used to live here came over to try and even they couldn't get it to budge. It's as if it's fused together. Is there pressure that is keeping it sealed shut? Is there another way to change this filter? I could really use some guidance here..