A pipe carrying sewage/ wastewater is called

It is pipe carrying sewage from Water closet

It is a pipe carrying sulluge from bathrooms,

kitchens, sinks, wash basins, etc.

A system of sewers of different types

and sizes in a town collecting wastewater from the town and

carrying it to the wastewater treatment plant.

These are RCC/ Masonary

chambers constructed at suitable intervals

along sewer lines

Traps are defined as fittings at the end

of soil pipes of waste pipes to prevent foul

gases coming out of the soil pipe/ waste pipe

House Drainage should be _______ to facilitate easy

repair and better maintenance.

House sewer joints should be leek proof because leekage if any shall create an

odour problem and leaked wastewater shall infilterate in the ground and shall

reduce _________ below foundation, which is not desirable.

The sewage or sullage should flow under the force of ____.

The house sewer should always be____

The entire system should be _____ from start to the end.

The house sewer should be connected to the manhole such that the invert level is

sufficiently higher to avoid _____ in house sewer

Where ever there is change in direction of sewer line in the premises, provide

_____

Rain water from roofs or open courtyards _______to flow through

the house sewers.

_______can never be permitted and therefore adequate ventilation

systems should be installed

is backflow caused by a negative pressure

is backflow caused by a downstream pressure that is greater than the upstream or supply pressure in a public water system or consumer’s potable water system.

Any physical or potential connection between a potable water supply and a hazardous material or one of questionable quality.

Good Traps should have following Qualities

type of trap

type of trap

types of trap

This trap is generally used to admit sullage from the floors of rooms, bathrooms, kitchen etc. in to the sullage pipe. This is provided with cast iron or stainless steel or galvanised gratings (Jallis) at its top so that the entry of larger matter is prevented therby chances of blockage are reduced. A commonly used name of trap is

is provided at a junction of a roof drain and other drain coming from kitchen or bathroom. As shown in figure below the foul sullage shall enter through the side inlet which is also called as back inlet and unfoul rain water shall enter from the top which is covered with cast iron grating.

may either have a P shaped or Q shaped water sealing arrangement. The water seal is normally 50 mm to 75 mm deep.

is provided at junction of a house sewer and muncipal sewer for preventing entry of foul gases of municipal sewer in to the house drainage system. Intercepting trap is provided in the manhole as shown in the following figure.

Advantage of Intercepting traps

Disadvantages of Intercepting traps

-Heavy matter shall retain in the trap if the discharge of wastewater is small and the small decompose producing four gases and thus the main purpose of preventing foul gases is not

served at all.

-When plug is broken the foul gases shall enter house sewers.

-Cleaning through the inspection area is difficult.

-Interceptor itself is an obstruction to the smooth flow

A pipe carrying human extracta

It is a pipe installed to provide flow of air to or from the drainage system or to

provide circulation of air in the drainage system to provide circulation of air in the drainage system to protect the water seal of traps against siponage and backflow.

A pipe carrying sullage

It is the pipe which is

installed to preserve the water seal in the trap

through proper ventilation

A pipe carrying only rain

water is called rain water pipe.

a pan like water flushed plumbing fixture

designed to remove human excreta directly and dispose the

same in to the soil pipe through trap.