Gully Trap Jali

Gully traps are buried in the ground with the tops or surround raised above ground level to prevent ground water entering into the sewer. Gully Trap stops sewage from returning up through the system and spilling into a house.

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Detailed Description for Gully Trap Jali

A gully trap is a basin in the ground which receives piped wastewater from your kitchen, bathroom and laundry before it is emptied into the sewer. The basin has a water seal to prevent foul odours of the sewer reaching the surface. The top or surround is raised above ground level to prevent stormwater and other foreign matter entering the sewer.

In periods of heavy rain, a sudden increase in water flowing into the sewer through gully traps can result in wastewater overflows elsewhere in thesewerage system. This can result in raw sewage entering our harbour. These excessive flows can also cause problems at the wastewater treatment plant due to system overloading.

A trap is a device which is used to prevent sewer gases from entering the buildings. The traps are located below or within a plumbing fixture and retains small amount of water. The retaining water creates a water seal which stops foul gases going back to the building from drain pipes. Therefore all plumbing fixtures such as sinks, washbasins, bathtubs and toilets etc. are equipped with traps. This article tells you the features of traps, various types of traps and water seal.    

These traps are constructed outside the building to carry waste water discharge from washbasin, sinks, bathroom etc. and are connected to the nearest building drain/sewer so that foul gases from sewer do not come to the house. These are deep seal traps, the depth of water seal should be 50 mm minimum. It also prevents the entry of cockroach and other insects from sewer line to waste pipes carrying waste water.



Smooth finish and rodent resistant

Low maintenance, leak and odour proof


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