This appraisal is for a range of Fernco standard and extra wide metal-banded flexible couplings with metal shear rings. This Issue 2 is to amend the brand of couplings from Flexseal to Fernco. No change to the product has occurred.
Metal-banded flexible couplings are designed for joining or repairing pipes of various material with the same or similar nominal internal diameters in low-pressure sewerage or drainage pipeline systems. Where the difference between the inside diameter of the coupling and the outside diameter of the pipe to be joined is greater than 16mm, an appropriate adapter bush is required to facilitate leak proof jointing. Fernco product literature provides details of available adapter bushes. See Appendix A.
The range of nominal diameters covered by this Appraisal is DN 100 to DN 600.
Fernco metal-banded couplings are supplied with Grade 316 stainless steel metal bands, shear rings and fasteners. The sleeve and adapter bushes are manufactured from EPDM rubber.
The couplings are not suitable for drinking water applications.