“Very easy to remove the old and install the new. The only reason to give a 4 instead of 5 is the waste of the old cartridge. I now have this new looking used cartridge that has to be thrown away instead of recycling the carbon filter inside. I would gladly give you a couple of extra bucks on the original purchase if the new cartridge came with a UPS label to send the old one back. What a waste!!!”
