Connect 3/8" tubing into a 3/8" female fitting with the three eighths by three eighths male adapter.

Connect 1/2" tubing into a 1/2" female fitting with the half inch by half inch male adapter.

Connect 1/2" tubing into a 3/4" female fitting with the half by three quarters male adapter.

Connect 1/2" tubing into a 3/8" female fitting with the half by three eighths male adapter.

Connect 3/8" tubing into a 1/2" female fitting with the three eighths by half male adapter.

Connect 3/4" tubing into a 3/4" female fitting with the three quarters by three quarters male adapter.