1 MJ gland is used to secure the gasket and create a watertight seal, though the 2nd MJ gland is used for joint restraint. Condition – Both equally pipes and tubes may be round. However, tubes could be rectangular and square shaped too, whereas pipes are only ever round. In https://sweet-directory.com/listings12806533/the-fact-about-hotpoint-condenser-dryer-graphite-7kg-that-no-one-is-suggesting