Branch pipe connection

A connector for connection to a hole in a side of a first pipe, the connector comprising:

• a locking ring having one axial end for locating in a hole in a side of a first pipe coaxially with the hole and an opposite axial end for projecting from the first pipe;
• a flange on the one end of the locking ring, a smallest outer diameter of the flange being larger than a largest diameter of the hole;
• a slit through the locking ring and flange defining a space in the longitudinal direction of the locking ring and flange over their entire radial lengths for the locating of the one end of the locking ring in the hole;
• a sleeve or branch pipe end having an external shoulder;
• a sealing member between the flange and an inside of the first pipe and extending to the sleeve or branch pipe end;
• and
• a support flange between the shoulder of the sleeve or branch pipe end and an outside of the first pipe,
• wherein at least one of the locking ring and sleeve or branch pipe end have an interconnection structure for tightening to the other, whereby to press the sealing member and support flange against the first pipe.