Ever wondered what's inside those cartridge-type water filters that go inside your refrigerator? I decided to find out. They are not cheap--they cost about $40 at Lowe's or Home Depot and you're supposed to replace them every 6 months.
- Hacksaw time! The cartridge is made of thick, sturdy plastic that is easily cut with a hacksaw.
- Once the end is off, the inner cartridge slides right out. It's a dense cylinder wrapped in a white membrane, with a white foam cap on top.
- The top end of the cylinder is sealed. The other end plugs into the water inlet at the bottom of the cartridge.
- Pulling the top off of the cylinder is kinda messy. The cylinder is full of compressed black powder, which I assume is activated carbon. It isn't clear in the photo, but there' s a channel through the center of the carbon.