Waste Pipes

The waste pipes fitted in domestic properties are usually bigger than supply pipes. Hand basins are fitted with a 32 mm waste outlet pipe, with the shower, washing machine, sinks and baths use a 40 mm pipe. The WC is a lot bigger with a 110 mm pipe which is the same size as a modern soil stack. Worcester Boiler Repair London fit all types of pipework.


Another very important difference with these types of pipes is that they must always slope downwards at the rate of at least 20 mm for every metre. This will make sure that the water runs away freely. In the past, the older type of waste pipes were made from lead, but the modern systems we have fitted today are exclusively made from plastic. Depending on the type of plastic used the pipes could be joined by simple push-fit connectors containing rubber ring seals, compression-type connectors with rubber olives or by solvent welding, using specially formulated solvent cement that softens the dries to form a strong watertight joint. Worcester Boiler Service London use compression joints.


Cutting, Jointing and Fixing Waste Pipes.

Cut plastic waste pipes with a hacksaw and then remove the burrs inside and out with a half round file before fixing. Solvent weld fittings are neat but not permanent, so they are ideal on visible pipework, it is better to use compression fittings under and behind sinks, so that you can take them apart again for cleaning and unblocking. When running pipes along an interior or exterior wall, hold them in place with waste pipe clips, which are available in different colours and sizes. Use wall plugs and screws to attach the clips to a masonry wall, or hollow wall fixings on plasterboard.


NOTE: Don’t forget to check for hidden pipes and cables before you drill.