| 摘要 |
Tapping fitting ( 1 ) suitable for application to a plastic pipe (P), comprising: a housing ( 5 ) including a hollow main section ( 6 ), the housing being attachable to a pipe (P); a cutter assembly ( 13 ) mountable within the hollow main section ( 6 ) and axially moveable therein into a cutting position wherein the cutting blade ( 14 ) engages the surface of a pipe (P) to which the fitting is attached; and a direct seal ( 23 ) between the housing ( 5 ) and the cutter assembly ( 13 ), wherein, in use, the seal ( 23 ) is maintained between the housing ( 5 ) and the cutter assembly ( 13 ) regardless of the axial position of the cutter assembly ( 13 ) within the housing ( 5 ).
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