Mini Split R410a Low Side Suction Charging Service Gauge Hose Set. 5/16" Port.

Important Tool for Installing a Mini Split System Ductless Air Conditioner with 5/16 SAE Service Port Connections. ---
Low Side (Suction Line) Pressure Gauge and Hose Set. Specially made for newer R410a Mini Split Systems. Fits on 5/16" Service Ports. ---
Includes a Suction Side (Low Pressure) Gauge.
Compatible with R410a Refrigerant.
High quality forged brass body and valve.
Blue Hose connects to 5/16" SAE service port on most newer R410a Mini Split Systems
Yellow hose connects to 1/4" port on most vacuum pumps and refrigerant tanks.
Use for attaching vacuum pump to evacuate the line sets and indoor units before releasing the refrigerant.
Use for charging additional refrigerant into the system.
Use for checking the low side operational pressures in COOLING mode.
DO NOT CONNECT TO THE SERVICE PORT WHILE THE SYSTEM IS RUNNING IN HEAT MODE.