There are 4 common types of post filters -- each with different type of fittings. Post filter is the top small horizontal filter on your RO system.
Look at the picture to determine which one is your type. Email us so we can send you the correct one.
If you look at your system, you will see that one side of the filter is hook up to the faucet. The other side is connected to the tank. You need to compare to the picture to determine which type of post filter you need.
