Materials Home › Forums › Archives › Old Bulletin Board Archives › Materials This topic has 0 replies, 1 voice, and was last updated 24 years, 9 months ago by Robert King. Viewing 0 reply threads Author Posts 21 Oct 1999 at 3:23 am #284852 Robert King Is ASTM A105 and/or A350 acceptable materials for fittings on plumbing systems? I have an older version of the UPC and niether is listed. Author Posts Viewing 0 reply threads The forum ‘Old Bulletin Board Archives’ is closed to new topics and replies.