Compression Ring 42mm DZR fittings-A range of non-manipulative (Type A) dezincification resistant (DZR) compression fittings for jointing plain and chrome plated copper tube to BS EN 1057; up to 28mm with Tectite Cross-linked Polyethylene/Cross-linked Polyethylene pipe to BS 7291 part 3; PB Pipe [with liner] to BS 7291 part 2; XPress Carbon System tube/carbon steel tube to EN10305-2; Tectite 316 System tube or Stainless Steel to EN 10312.