The purpose of compression fittings
is to combine or connect tubes or pipes. A smaller compression fitting consists of two components - a nut and ring. Ferrules or the ring have beveled edges, and to ensure a perfect fit, it should be oriented correctly to the tube or pipe. The nut is then tightened, compressing the ferrule to the nut and the fitting. For larger compression fittings, they don't use a nut to tighten the ferrule. It relies on a flange and bolts
. It is a common misconception that thread sealants are necessary, but that is not the case. This is because this fitting connects pipes through compression and not by tightening the thread. It is recommended to apply grease or oil for a smooth and consistent tightening. Over-tightening should be avoided since it could damage the compression fittings' ferrule.