Fittings for waste pipes.The fittings for this system work as the name suggests. Rubber rings are compressed between the fitting and the pipe in such a way as to produce a watertight seal. Many standard plumbing items are now of the compression type since they allow for the pipework to be readily dismantled and reassembled. This makes it easy for blockages to be cleared. The general arrangement is a fitting trap or bend, with a large plastic nut at both ends, and a rubber ring or washer for each end of the connection. Fittings such as these are carried by professional plumbing companies such as Bounds Green Plumbers whos work is guaranteed.Cutting a waste pipe.Each fitting slides over the waste pipe up to a particular point. When the pipe is cut, be sure to allow for this extra amount to ensure a watertight connection. The pipe should be cut to length and any burrs should be cleaned off with a small file so that the end is smooth. This is very important for the inner edge, since the waste water flowing through may well contain debris which will quickly build up to form a blockage around any rough surface.Connecting a joint.Place the large nut over the pipe. Now fit the rubberised ring or washer. If this has a tapered shape, make sure that the taper goes against the fitting side. Finally, insert the pipe into the fitting and tighten the nut. These fittings are designed to be hand tightened only. Do not use spanners or pipe grips. The rubberised washer is relatively soft and can be perfectly adequately compressed with hand tightening. If the joint leaks, it is usually because one or the other component is out of line or misplaced, rather than the washer not being compressed enough. This can be easily diagnosed and rectified professionally by a Bounds Green Plumber as part of the comprehensive plumbing service.