Quick Drain for Oil Sump Main Page › Forums › L-5 Maintenance Forum › Quick Drain for Oil Sump This topic has 0 replies, 1 voice, and was last updated 2 weeks, 5 days ago by Charles Rooks. Viewing 0 reply threads Author Posts 2026-09-23 at 6:58 pm #6745 Charles RooksParticipant Has anyone installed a Saf-Air quick drain plug on the O-435 in their L-5 series? Plug threads width is 1.0 inches. Author Posts Viewing 0 reply threads You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In