What is Plumbing Trap & 14 Plumbing Trap Used in House

What Is Plumbing Trap & 14 Types of Plumbing Trap Used In House

A Plumbing Trap is a simple device of shape bending pipe that allows the passing of waste material. It also retains fluid for the prevention of the sewer gases from entering the building. Mostly, U, J, Q, or S-shaped pipes are located just beneath or within a plumbing fixture in domestic applications.

In comparison, a P-shaped plumbing trap is most commonly preferred. There are various Plumbing Trap Types available in the market.

A work that is essentially linked to the disposal of sewage and water supply is Plumbing work. The plumbing pipes framework will stay scentless gave; it is planned ably and introduced tolerably. A  plumbing trap has the accompanying highlights.

It very well might be made as an essential trap with the machine as in some European WC models, or it very well might be a different fitting called a joined trap, which is associated with waste or foul water outlet of apparatuses.

The traps ought to be of a self-cleaning design. Traps for use in homegrown waste ought to be helpful for cleaning. A decent trap ought to keep an effective water seal under all states of a stream.

The plumbing traps are situated underneath or inside a pipe apparatus and hold a limited quantity of water. The holding water makes a water seal that prevents foul gases from returning to the channel pipes’ structure.

Hence all pipes installations, for example, sinks, washbasins, baths, latrines, and so forth, are outfitted with traps. This article discloses to you the highlights of traps, different sorts of traps.

Read More: 16 Plumbing Fittings Types With Their Application & Pictures

Various Types of Plumbing Trap are Listed Below:

  1. Gully Trap
  2. P Trap
  3. S Trap
  4. Q Trap
  5. Floor Trap / Nahni Trap
  6. Bottle Trap
  7. Intercepting Trap
  8. Running Trap
  9. Drum Trap
  10. Straight-Through Trap
  11. Low-Level Bath Trap
  12. Building Trap
  13. Bell Trap
  14. Grease Trap

1. Gully Trap:

This plumbing trap types are built external to the building to carry wastewater release from sinks, washbasin, restroom, and so on, and are associated with the most nearby building drain or sewer so that foul gases from the sewer don’t go to the house. These are profound seal traps. The profundity of the water seal ought to be 50 mm at least. It additionally keeps cockroaches and different bugs from sewer lines to squander pipes carrying wastewater. Gully traps are available in the following three shapes:

Gully Trap - Types Plumbing Trap Used in House
Gully Trap
  • P Trap
  • S Trap
  • Q Trap

2. P Trap: 

This trap is utilized with the Indian water closet (ORISSA Pattern). The traps are produced using cast iron or UPV sheet. This trap likewise has a water seal and forestalls section of foul gases to the house. 

P Trap - Types Plumbing Trap Used in House
P Trap

3. Q Trap: 

This plumbing trap types are utilized in the latrine submerged storage room. It is practically like an S trap and is being used in the upper storey other than the ground floor. 

Q Trap - Types Plumbing Trap Used in House
Q Trap

4. S Trap: 

This plumbing trap types are like a P-shaped trap and is utilized for fixing water closets in latrines. The lone contrast between the P trap and the S trap is that the P-shaped trap is being used for an outlet through the wall while the S-shaped trap is utilized for an outlet through the floor.

S Trap - Types Plumbing Trap Used in House
S Trap

5. Floor Trap/Nahni Trap:

The floor plumbing trap types are additionally called Nahni Trap (Nahni in Hindi methods washing/washing place). Nahni plumbing Trap is given to forestall the foul gasses going into the building by providing the water seal. At least 50 mm profundity of water seal ought to be given. If squander water is streaming, floor trap forestalls the foul gases (awful stenches) to enter the building.

To gather wastewater from the bathroom, wash zone, washbowl, kitchen sinks, and so on, a floor trap or Nahni trap is provided into the floor. Floor traps are accessible in PVC, UPVC, and CI; they are without vent pipe, yet removable grinding is shown at the Traps’ highest point.

Floor Trap/Nahni Trap - Types Plumbing Trap Used in House
Floor Trap/Nahni Trap

Floor traps or Nahni traps (Nahni implies washing place) arrive in an assortment of shapes, sizes, and outlet conditions. Many don’t have a water seal by any stretch of the imagination and have a non-uniform and unpleasant bore. Nahni traps are a wellspring of significant spillages because of their helpless plan, projecting, and low quality. It is forestalled by utilizing just profound seal P traps with multi-gulf fitting/traps with associations from washbowls and other fitting to give a positive joint.

This plumbing trap types are introduced in the regions may lose their water seal because of dissipation. The arrangement should be made to re-establish the seal by adding water intermittently. This should be possible by associating a waste apparatus to the trap (for example, a washbowl, and so forth).

Likewise, recharging is accomplished by introducing a refined water supply valve with a reverse avoidance gadget associated with the trap. Care must be taken to forestall the establishment of traps that are presented to freezing conditions.

The floor trap’s length is 310 mm, with at least 80 mm distance across at the channel end, 30 mm width close to outlet end, and 73 mm breadth outside the floor trap outlet.  What’s more, 95 mm grinding size gave the highest point of floor trap with 8 mm measurement openings.

Read More: 75+ Construction Tools Name and Their Uses with Image

6. Bottle Trap:

A bottle pumbling trap is given to get squander from washbasin, kitchen sinks and different machines where the apparatuses don’t have an underlying trap.

Bottle Trap - Types Plumbing Trap Used in House
Bottle Trap

7. Intercepting Trap:

Intercepting plumbing trap types are given into the Interceptor Manhole (Interceptor Chamber). An Interceptor sewer vent is provided at the interference of building sewer and Public sewer. That blocking type of trap is given to keep the foul gases from public sewers entering into the building sewer by providing a water seal.

Intercepting Trap - Types Plumbing Trap Used in House
Intercepting Trap

8. Grease Trap:

A grease trap is introduced in the waste line from at least one installations to isolate grease from the fluid and hold it.

This kind of trap is a gadget to gather the grease substance of waste and can be cleaned from the surface. This is mostly utilized in the food handling unit.

Grease Trap - Types Plumbing Trap Used in House
Grease Trap


There are numerous sorts of plumbing trap types: Intercepting Trap, Floor Trap or Nahni Trap, Gully Trap, P Trap, Q Trap, S Trap, Bottle Trap, Grease Trap. They are accessible in various materials like PVC, GI, and so forth. 

Previously mentioned kinds of traps are broadly utilized in pipes work, yet ideal pipes traps have the following highlights or advantages: 

  • Simpler and speedy establishment 
  • Longer service life 
  • Protection from the effect harm and household substance 
  • Forestall section of foul air, insects, and parasites from the sewers 
  • It is against rat and self-cleaning. 
  • Conservative 

On the off chance that you need your home liberated from the foul smell, bugs, and parasites, utilize the appropriate and the best kind of plumbing traps. This isn’t just effectively and quickly introduced, yet it welcomes less weight on your pocket as well.

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