In architecture, an English WC with an S-trap refers to a type of water closet (toilet) that features an S-shaped trap in its plumbing system. The S-trap is a curved pipe below the toilet bowl that connects to the floor drainage system, forming a water seal that prevents sewer gases from entering the building.
This design is common in installations where the drainage outlet is located in the floor rather than the wall. The S-trap is particularly useful in older buildings and ground-floor bathrooms, offering a straightforward solution for floor-based plumbing systems.
When designing spaces with an S-trap WC, architects consider factors such as proper ventilation, ease of maintenance, and compliance with local plumbing codes to ensure functionality and hygiene. The English WC with an S-trap combines efficiency with simplicity, making it a practical choice in various architectural contexts.
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Image of English WC with S-trap detail and downloadable (in DWG) link below
English WC with S-trap detail drawing – 1
An English WC with S-trap in construction is a simple but essential plumbing detail. Here’s a description of its key components and layout:
- Toilet Bowl: The main ceramic fixture that holds water and receives waste. It sits directly over the S-trap connection.
- S-Trap Pipe: A curved pipe below the toilet bowl in an “S” shape, connecting the bowl’s outlet to the floor drain. It creates a water seal that prevents sewer gases from rising into the bathroom.
- Floor Outlet: The S-trap connects to the floor drainage system, making it ideal for bathrooms with floor-level waste pipes.
- Flange and Bolts: A mounting flange at the floor secures the toilet in place with bolts, ensuring a tight fit and preventing movement.
- Seal or Gasket: A rubber or wax ring between the toilet base and the flange ensures a watertight seal.
- Water Inlet and Flush System: A water supply line connects to the flush tank, delivering water for flushing. The flush mechanism empties the bowl, pushing waste through the S-trap and into the drainage system.
- Vent Pipe (Optional): To maintain proper air pressure in the drainage system and prevent siphoning of the water seal, a vent pipe may be included, leading to the building’s vent stack.
In section view, the S-trap curves downward from the bowl outlet, forming the water seal, then rises again before connecting to the floor drain. The proper slope ensures smooth wastewater flow while maintaining the trap seal.
Our tips to help you improve your architectural English WC with S-trap detailing.