These connectors are often used in reverse osmosis (RO) systems, water filtration, and similar plumbing setups. Here’s a description of each type:

🟦 Ball Valves (with Blue Handle)

• Purpose: Allow manual control of water flow (on/off).

• Types in your images:

  • With push-fit connectors on both sides.

  • With push-fit on one side, male/female thread on the other.

  • With integrated nut for appliance connection (e.g., inlet valve for RO systems).

🟦 Elbow Connectors (90-degree angle)

• Purpose: Change the direction of tubing at tight angles.

• Types:

  • Push-fit to push-fit elbows.

  • Push-fit to female threaded elbows.

  • Push-fit to stem elbows (one end fits into another push fitting).

🟦 Straight Couplers / Union Connectors

• Purpose: Connect two lengths of tubing in a straight line.

• Types:

  • Both ends push-fit (for same size tubing).

  • One end push-fit, one end male thread (adapters).

🟦 Tee Connectors

• Purpose: Split water flow into two directions.

• Types:

  • Push-fit on all 3 sides (equal tee).

  • Some tees have integrated valves for branch isolation.

🟦 Y / 3-Way / Diverter Connectors

• Purpose: Divert water flow into two outlets.

• Design: 3 push-fit ports, shaped like a Y.

🟦 Threaded Adapters (Male/Female)

• Purpose: Transition from tubing (push-fit) to threaded fittings.

• Types:

  • Push-fit to male thread.

  • Push-fit to female thread.