134a Lowside Thread Down Coupler w/14mm ends #3055
Thread down couplers are used for hard-to-reach Schrader valves
These couplers are for use with R134a hoses only.
Turn knob counterclockwise to raise depressor valve. (This makes it easier to install on lowside port)
After coupler has been installed, turn knob clockwise to insert product and read pressure.