Hose/Line HVAC

Tightening torques for the O-ring fittings
3/8 in. tube for liquid line 12 - 14 Nm (9 - 10 ft-lb)
1/2 in. tube for discharge line 20 - 24 Nm (15 - 18 ft-lb)
5/8 in. tube for suction line 30 - 34 Nm (22 - 25 ft-lb)