Plastic Wastes Pipes

Nowadays, waste pipes and fittings are almost entirely made of plastic. These are relatively inexpensive and simple to instal. see this
There are many different brands of pipe and fitting available, but there is not complete interchangeability between brands, so some investigative work may be required when adding to an existing plastic waste system, and it is usually safer to stick to one brand when installing a new system.
Basins usually have 1-1/4 in (32mm) tubing, while baths and sinks have 1-1/2in pipe (40mm). WC pipes are usually 4in in diameter (100mm).
Waste pipes made of plastic
A hacksaw with a tine-toothed blade is ideal for cutting plastic tubing.
Joining can be accomplished in three ways. Connectors in the push-fit system have rubber sealing rings (‘O’-rings) that seat into grooves on their inside surfaces. Smooth the ends of the tubing, chamfer the exterior surfaces at around 15 degrees, and then lubricate them with water, soap, or a special silicone lubricant to form a joint. Finally, completely insert the pipe ends into the connector and remove the pipe slightly (usually 10mm) to allow for thermal expansion. Refer to the manufacturer’s instructions for more details.
A compression (or ‘universal’) fitting is distinguished by a plastic nut that compresses a scaling ring. This form can handle pipes of varying sizes.
Wipe the pipe ends and the inside of the connector with a degreasing cleaner before coaling them with a solvent cement to create a solvent-weld joint. Then force them together and leave the joint alone for a few minutes to allow the cement to dry. Manufacturers often advise against using the pipe for 24 hours.