Bell Trap

A bell trap is a type of plumbing trap that is typically used to prevent sewer gases from entering a building. The trap is called a bell trap because of its shape, which is similar to a bell. The bell trap is often used in situations where a traditional P-trap cannot be installed because of space limitations.

A bell trap consists of a horizontal section of pipe that is connected to the drain pipe and a vertical section of pipe that is connected to the sewer line. The vertical section of pipe is designed to be lower than the horizontal section of pipe, which creates a small area of trapped water. The trapped water acts as a barrier, preventing the sewer gases from entering the building.

Uses: Bell traps are typically used for sinks, toilets, and other fixtures that have limited space underneath them. They’re also used in some older buildings where there is not enough space for modern plumbing.

Advantages:

  • Bell traps are very compact and can be installed in tight spaces where traditional P-traps cannot fit.
  • Bell traps are relatively simple to install, making them a good option for DIY projects
  • They are less expensive than other types of traps

Disadvantages:

  • Bell traps are not as effective at preventing sewer gases from entering the building as P-traps
  • they can be prone to clogging if not properly maintained
  • they require a larger trap arm which is the horizontal pipe between the trap and the wall, this can be a limitation when space is limited.

Limitations:

  • Bell traps should not be used in situations where a traditional P-trap can be installed.
  • They should not be used in areas that are prone to flooding.
  • They’re not recommended for commercial and industrial use, as they are not as effective as P-traps.

It is important to note that bell traps are not as effective as P-traps at preventing sewer gases from entering the building. They are typically only used when a P-trap cannot be installed. It’s important to ensure that the installation is done by a professional plumber to ensure proper function and avoid any potential issues.


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About the Author
Er. Mukesh Kumar
Er. Mukesh Kumar is Editor in Chief and Co-Funder at ProCivilEngineer.com Civil Engineering Website. Mukesh Kumar is a Bachelor in Civil Engineering From MIT. He has work experience in Highway Construction, Bridge Construction, Railway Steel Girder work, Under box culvert construction, Retaining wall construction. He was a lecturer in a Engineering college for more than 6 years.