Types of traps

TRAPS
Trap is a bend in the pipe where the waste goes out of the toilet. It retains some
water after flushing causing a seal and preventing sewer gases from entering the
building.
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.

Floor trap or Nahni trap
 Floor trap or Nahni trap is provided
in to the floor to collect waste water
from bathroom, wash area,
washbasin, and kitchen sink etc.

Gully Trap:
 A gully trap is provided outside the building before
connecting it to external sewerage line. It also collects
waste water from the kitchen sink, wash basins, baths
and wash area.

• P-TRAP
P-trap pipe is designed to outlet through the wall
mounted toilets. In most homes, there is a P-
trap installed under the sinks in the bathroom and
kitchens. A P-trap is a plumbing fixture that has
several purposes. It traps debris that has drained
from the sink and prevents it from forming a clog
deep within the plumbing system, and to stops sewer
gases from passing into the home.

S-TRAP
S-trap is designed to outlet through the floor. Therefore
S-trap pipe is not suitable for wall mounted toilets.

P-TRAP Vs S- TRAPS
 The P Trap and S Trap and two different types of traps
used in plumbing and connect to most commonly sinks
but can be used for all drainage such as toilet floor drain
etc. S bend trap has the shape of an S, and P bend is
shaped like a P.
Comparison b/w P and S- TRAPS-
P-TRAP S-TRAP
AGE Newer Older
EFFCIENCY More effective at it if fairly consistent Less effective as it has a tendency of
In maintain the water trap. Drying out allowing flow of gases.
RECOMMENDATION More recommended Not recommended. Banned in some
places like US.

BOTTLE TRAP
This trap is used below washbasin and sinks to prevent
entry of foul gases.
Q- TRAP
This trap is used in toilet under
water closet. It is almost similar
to S trap and is used in upper
storey other than ground floor.

INTERCEPTING TRAP:
This trap is provided at the last main hole of building
sewerage to prevent entry of foul gases from public
sewer to building sewer. It has a deep-water seal of 100
mm.
GREASE TRAP:
This trap is a device to collect the grease contents of
waste and can be cleaned from the surface. This is
generally used in food processing unit.

THANK YOU
GROUP MEMBERS
DYASH
TANVI
DHRUV
BISHAN

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