To create a bit of confusion, drainage outlets in the kitchen and bath are larger than the drainage outlets in the bathroom vanity, generally because of the amount of water that is shifted. In the kitchen and bath the standard size in Australia for the plug is 1 3/4 inch.
A 32mm waste pipe is typically used for appliances that present low volumes of water to the system (e.g. small hand basins), while 40mm is normally used for kitchen sinks, showers and baths. 50mm, on the other hand, is large to suit commercial applications or connect multiple waste pipes to a single flowing system.
Depending on your local plumbing codes, the main sewer line for residential homes is usually 4 inches in diameter. You may think if the pipe were larger, more waste could travel without getting clogged. But that's not true.
PVC Pipes
PVC piping is generally used as part of a sink, toilet, or shower drain line, though it's sometimes used as a home's main water supply pipe.
Wash hand basin (bathroom sink) wastes use a 32mm / 1-1/4 inch trap. Kitchen sinks, baths and shower wastes use a 40mm / 1-1/2 inch trap.
The 1½-inch size is used to capture water that might flow out of a kitchen sink, a bathroom vanity or a tub. The two-inch pipe is commonly used to drain a shower stall or washing machine, and it may be used as a vertical stack for a kitchen sink. A three-inch pipe is what's used in homes to pipe toilets.
It's not uncommon for plumbers to use the system they prefer when carrying out repairs, as a result of this, you may see two different types of pipe and connectors in one home. Remember: 40mm is for push-fit or compression fittings. 43mm is solvent glued weld and also compression fittings.
Kitchen sink P-Traps come in 1-1/2” standard size, while bathroom sinks use P-Traps of 1-1/4” standard size. The traps also come in different material types such as propylene, ABS, brass (chrome-plated or natural), and PVC. You should use the material that is currently in place when replacing a P-Trap.
Most faucet supply hoses are 1/2”, with a 3/8” compression fitting to connect to the building water lines. But still take note of measurements in your application, and make sure you have any necessary fittings to connect your new faucet to your water lines before you begin the installation process.
So, the choice of pipe should also match the interior design of your kitchen otherwise it will look ugly. There are several types of kitchen sink but you have to pick the best on among them. For kitchen drains, generally, PVC pipes are preferable to metal pipes as PVC pipes don't corrode.
Plastic waste pipe is available in 4 basic sizes (external diameter) for different plumbing uses: 21.5mm - for overflows such as cold water tank, cisterns etc. 32mm - for hand basin waste pipe. 40mm - for sink and bath waste pipe.
Find the outside diameter if the pipe has male threads or no threads. The outside diameter is from outside edge to outside edge across the pipe. To find it, measure around the circumference of the pipe with flexible measuring tape. Divide the circumference by pi, or about 3.14159.
Land Drain Pipes
In both perforated and unperforated coils, lengths of 25m and 50m are available in 5 diameters to allow installers to dictate in part the rate of water flow. Land drain pipes are available in 60mm, 80mm, 100mm, 160mm and 200mm diameters.
Waste Pipes - 32mm for small hand basins, 40mm for sinks, showers, baths, washing machines and dishwashers, 50mm for commercial applications and connecting multiple waste pipes to a single flow.
PVC Pipes
Polyvinyl chloride pipes (PVC) are commonly used as part of a sink, toilet, or shower drain line. Its plastic tubing is ideal for this kind of usage because it protects the water from rust and corrosion better than other types of pipes. This capability also makes PVC pipe incredibly durable.
A *sink* should have a 40mm pipe fitting, where as a *basin* has 32mm. Doubt you will get a 32mm/40mm fitting, will need a 40/40 elbow with 32/40 conversion on one end.
Generally speaking, the main pipeline from the street to your home is either ¾ or 1 inch in diameter. Supply pipes are ¾ inch in diameter and individual components are ½ inch in diameter.
These supply lines are the connections between your water valves and your sink faucet. Over time, these supply lines can wear out, especially around the connections.
Most kitchen sinks have 1/2" copper lines roughed into the sink cabinet. The normal sink valve would be a 5/8" X 3/8" angle compression stop which is on mostly all the residential sinks I see. Often though a tee may be installed with two indvidual "compression stops" installed.
The size of the trap will depend on the type of appliance and the size of your waste pipework. Generally, the following types of appliances use a standard size waste trap and waste pipework: Wash hand basins: 32mm (1 ¼ inch). Sinks: 38mm (1 ½ inch).
The P-trap is now the standard since the S-trap was deemed ineffective and prohibited in new construction under the Universal Plumbing Code. The S-trap was found to be prone to siphoning and drying out, which leaves the apparatus ineffective.
40 mm (1.1/2") BS 5254, BS EN 1451-1:2000 plastic pipe. Do not solvent weld. The actual pipe size is approximately 41 mm o.d. x 36 mm i.d..
Polypipe 40mm solvent weld waste pipe actual external diameter is 43mm.
ABS waste pipes are available in three size options. 32mm is generally used for washbasins and bidets, 40mm is used for baths, showers, kitchen sinks and dishwashers. 50mm waste is commonly used for commercial applications or where a number of waste pipes come together in a single flow.