fig3 a 3 c in use crimping ring 130 is slid over plastic pipe 120 then plastic pipe 120 is pushed over barb 142 and the crimping ring 130 is positioned to approximately the middle of the barb then crimping tool 20 fig5 is opened and moved over crimping ring 130 then crimping tool 20 fig6 is fully closed so that smooth surfaces 160 and 162 and smooth surfaces 164 and 166 are in abutting relationship then crimping ring 130 is gauged to make sure that the crimping step has been done properly if tool crimping 20 u2032 is employed that tool itself is used to verify that the crimping step has been done properly although various sizes of crimping tools 20 fig1 and 20 u2032 fig7 may be provided the crimping tools may be sized to accommodate crimping rings 130 for pipe sizes u215c u2033 u00bd u2033 u215d u2033 u00be u2033 1 u2033 and 1 u00bc u2033 for example in the embodiments of the present invention described above it will be recognized that individual elements and or features thereof are not necessarily limited to a particular embodiment but where applicable are interchangeable and can be used in any selected embodiment even though such may not be specifically shown spatially orienting terms such as u201c above u201d u201c below u201d u201c upper u201d u201c lower u201d u201c inner u201d.