IMC Welded Duct Connections Below can be a sample with the Bell variety joint. The male side with the joint belongs to the uphill side of the sloping duct so the grease will drain again down. The ducts and fittings have to be supported by hangers of non-combustible materials intended https://commercialkitchenextracts89000.blogmazing.com/35999101/fascination-about-grease-tight-extract-ductwork