The main functions of a plumbing bubbler include water conservation, splash and noise reduction, filtration, and stabilizing water flow. The following is a description:

Water conservation. A bubbler allows the water flow and air to mix well, creating a foaming effect that improves flushing power and reduces water use, and faucets installed with a bubbler have been reported to save about 50 percent of water compared to faucets without the device.

Anti-splash and noise reduction. The flow of water mixed with air becomes softer and less impactful, resulting in reduced jets of water and noise.

Filtration. The multi-layer filter in the bubbler filters out most sediment and impurities, and the internal mesh design filters out larger particles of impurities, but can occasionally become clogged, so regular cleaning is required.

Stabilize water flow. A bubbler with a pressure-compensating or flow-limiting device ensures a certain amount of water output when water pressure is too low, limits the amount of water output when water pressure is too high, and maintains a steady flow of water when water pressure is unstable.