Connect 1/2" tubing to a 1/2" female connection with the half by half male straight stop, halting the flow with the valve knob in between.

Connect two 1/2" tubes at a 90 degree angle like an elbow does, but with the ability to halt the flow with the stop valve.

Connect two 1/2" tubing pipes with the half by half straight stop, and halt the flow with the valve knob in between.

Connect two 3/8" tubes with the ability to halt the flow with the stop valve.

Connect two 3/8" tubes at a 90 degree angle like an elbow does, but with the ability to halt the flow with the stop valve.