| 摘要 |
<p>A method of fitting a tee piece (1) formed from a plastics material and comprising an upstanding hollow member having a tubular passage and a side pipe connected thereto, to a fluid distribution main formed from a plastics material characterised in that it comprises: fusing a saddle (2) having the tee piece mounted thereon to a wall of the distribution main, connecting a hole cutting device (10) to the upstanding hollow member of the tee piece, the hole cutting device comprising a hollow body member (11) have a bifurcated internal bore, and having slidably mounted within the respective arms (13,14) of the bifurcated internal bore a cutting means and a blocking means, passing the cutting means (17) through the upstanding hollow member and cutting a hole in the wall of the distribution main, withdrawing the cutting means into one of the arms of the bifurcated internal bore of the hole cutting device, passing the blocking means along the bifurcated internal bore until it is received in the upstanding hollow member and blocks the tubular passage thereof whilst leaving the side pipe connection to the surface pipe open, and removing the hole cutting device and, if necessary, capping the upstanding hollow member. <IMAGE></p> |
