JACO compression tee fitting, if your system doesn't run on quick connects, this 3/8" x 3/8" x 3/8" tee fitting will work.  Connects to your GAC inline filter, it works exceptionally well with reverse osmosis systems.  These are great quality parts that are safe and easy to use with any water system.

Features:

• Reliable and easy to use.
• NSF and ISO 9001 Certified and are trusted by the world's largest manufacturers.
• Create a water tight seal every time.
• Polypro fittings and their EPDM o-rings are more resistant to chemical degradation than the Grey Acetal Fittings which have been available for many years.
• Works great for drinking water and most other applications