Any bathroom plumbing system has two main parts, which are the water supply system and the waste water system. The water supply will carry clean water to all the fittings, taps for bath and basins, and for cisterns attached to a WC. You can also have showers, and water leading to instant water heaters and other installed fittings.

Before any work is started on a bathroom plumbing Inner West system it is necessary to trace all the pipework that is needed, so that each pipe leads to the correct point. The same exercise has to be carried out for the waste water system, and this requires more care because this works through gravity, and requires pipes to be laid to ensure proper gradients that allow the water to flow away to outside manholes or drains.

For the water supply, it is important that at its point of entry to the bathroom of the main supply line, this pipeline be fitted with a proper valve that can enable the supply of water to the bathroom to be cut off, if any repairs or other maintenance work is to be carried out on the plumbing system. All drainage lines must be also fitted with traps and seals that will prevent gas from the sewerage system coming into the bathroom.

In a bathroom plumbing Inner West system you can have the water supply directly connected to the municipal main, or have an overhead tank that is filled through the municipal main, and all water connections required in the bathroom or elsewhere taking their supply form the overhead tank. This can lead to reduced pressure in the taps and showers in the bathroom.

Most bathroom plumbing systems in modern homes are concealed, and this requires a lot of care to be taken in their installation. The pipe network must be tested under high pressure before the network is concealed behind the floor or wall tiles. Hot water pipes are also required to be properly insulated before they are covered. Similar tests must be conducted on drainage pipes, with a smoke test often used to detect leaks or poor joints. It is important to ensure that water flows away easily from the laid down drains and flows into the catch pit or manhole outside the house.

It can make sense to install stopcocks on each pipeline that supplies water to a fitting so that it can be used when that fitting has to be repaired or replaced. It is also important to ensure that the floor of the bathroom is properly sloped to lead water falling on it into the floor drains that have to be installed in every bathroom.