1556 Polybutylene Pipe Crimp Fitting - Plumbing - Distribution Piping in the House -

Image Text: Polybutylene pipe > the crimp ring should be copper - older aluminum crimp rings have been problematic > crimp ring > barbed insert fittings should be copper or brass - older polyacetyl (plastic) fittings were more likely to cause leaks at connections > coupling > 1/8 inch to 1/4 inch from end > polybutylene pipe > after the crimp ring is installed, its DIAMETER is checked with a special gauge to ensure that it has not been over tightened or under tightened