20
2. Remove the screw cap of the valve and aim the pipe joint at the bell mouth of the pipe.
3. Pre-tighten the union nut by hand.
4. Use a torque wrench to tighten the union nut. Refer to the table below.
Hex Nut Diameter (inches / mm)
Tightening Torque (ft/lb / N•m)
Φ
15
/
64
”
/ Φ6mm
11~14ft/lb / 15~20N•m
Φ
3
/
8
”
/
Φ9.52mm
22~30ft/lb / 30~40N•m
Φ
15
/
32
”
/
Φ12mm
33~41ft/lb / 45~55N•m
Φ
5
/
8
”
/
Φ16mm
44~48ft/lb / 60~65N•m
Φ
3
/
4
”
/
Φ19mm
52~55f
t/lb / 70~75N•m