Tightening LPG
Tighten the nut by hand.
Counterhold using a tool. Turn a further 90°-120°
Check for leakage. See Gas Pipe, Checking For Leaks .
Tightening CNG
Pre-installed nut
Tighten the nut by hand.
Counterhold with the tool and turn a further 60° . In the event of leakage, tighten a further 15° and check for leakage. If necessary tighten a further 15° .