In this video, I will demonstrate how to replace your whole house water filter. Water filters for your home should be replaced approximately every six months, depending on use. To perform this task, you will need a spanner wrench that fits around your water filter casing, and some food grade silicone grease for the O-ring. This specific filter is a 20 inch filter made by Pentair. The silicone grease is made from KEZE. This is a very easy do it yourself job.