WHAT SIZE SINGLE CHAMBER ORIFICE FITTINGS DOES RJ CARRY? We carry 2″ to 4″ single chamber orifice fittings. By frontierMedia|2018-12-05T09:02:35-06:00November 19th, 2018|SINGLE CHAMBER ORIFICE FITTINGS|0 Comments Share This Story, Choose Your Platform! FacebookTwitterLinkedInPinterest