Which are various systems of sanitary fitting in building?

These are various systems of sanitary fittings in building:

• One pipe system
• One pipe system partially ventilated
• Two pipe system
• Single stack system
• Single stack partially ventilated

• One pipe system: In this system of plumbing the waste connections from sink, baths and wash basins and the soil pipe branches are collected into one main pipe. This main pipe is connected directly to the sewerage system. All the traps of water closets and basins etc. are completely ventilated to preserve the water seal.
• One pipe system partially ventilated: This system is also called single stack, partially ventilated. In this system there is one soil pipe into which all water closets, baths, sinks and basins discharge. There is a relief vent which ventilates only the traps of water closets.
• Two pipe system: In this system soil and waste pipes are distinct and separate. The soil pipes are connected to the sewer directly and waste pipes through a trapped gulley. All the traps of all appliances are completely ventilated in this system. Single stack system: One pipe system has no trap ventilation. Single Stack, Partially Ventilated: It is a medium between the one pipe system and single stack system. In this system there is one soil pipe into which all water closets, baths, sinks and basins discharge. There is a relief vent which ventilates only the traps of water closets.