Which fixtures typically require individual venting according to UPC?

Individual venting is crucial for the proper functioning of fixtures in a plumbing system to ensure effective drainage and to prevent the release of sewer gases into living spaces. In the context of the Uniform Plumbing Code (UPC), certain fixtures are mandated to have individual vents to maintain the system's integrity.

Sinks, whether in kitchens or bathrooms, typically require individual venting. This is because they experience varying water flow and drainage patterns that can create negative pressure, potentially siphoning water from the traps. Proper venting allows air to enter the drainage system, thus balancing pressure and preventing trap siphonage.

Toilets also require individual venting for similar reasons. The flushing action of a toilet can create significant changes in pressure throughout the drainage system. Without adequate venting, there could be a loss of trap seal, leading to potential sewer gas entry or drain blockage.

While showers and bathtubs might not always require individual vents under certain circumstances, they often can share a vent, especially in installations where the drainage is correctly engineered. Washing machines and dishwashers typically have different venting requirements and can often be connected to existing venting systems without the need for individual vents. Water heaters and sump pumps generally do not require venting in the same way that sanitary