Drainage Flashcards
Conveys only wastewater or liquid waste free or fecal matter
Waste Pipe
Used for ensuring the circulation of air in a plumbing system
Vent Pipe
A liquid seal which prevents the back flow or foul air or methane gas without materially affecting the flow of sewage or wastewater through it
Trap
Vertical main of a system of a soil, waste or vent piping extending through one or more storeys and extended thru the roof
Stack
Any part of the piping system other than a main, riser or stack
Branch
Part of the lowest horizontal piping of a plumbing system which receives the discharges from the soil, waste and other drainage pipes inside of a building
House/Building Drain
Extend from the house at a point 0.60 meters from the outside face of the foundation wall of a building to the junction with the street sewer
House/Building Sewer
Minimum slope or pitch of horizontal drainage pipe
2% or 20 mm
Used for lavatories, kitchen sinks, laundry tubs and urinals
Common P-Trap
Used for extreme conditions because resealing quality is greater
Deal Seal P-Trap
Used for fixtures such as slop sinks that are usually low in the ground, leaving a very little space for a foundation and a trap
Stand Trap
Used within the line of the house drain
Running Trap
The principal artery of the venting system to which vent branches are connected; Collecting Vent Line
Main Vent
Pipe installed to vent a fixture trap that connects with the vent system above the fixture served or terminates in the open air
Individual Vent
The portion of a vent pipe system that ventilates two fixture traps that discharge into a sanitary cross tee
Unit, Common or Dual Vent
Installed to ventilate the soil and waste pipe and the connecting branches rather than fixture traops
Relief Vent
Pipe connecting upward from a soil or waste stack below the floor and below the horizontal connection to an adjacent vent stack at a point above the floor
Yoke or By Pass Vent
Used when two or more fixture traps are installed on the horizontal soil or waste branch; Serves a battery of fixtures
Circuit Vent
Type of ventilation used on fixtures in a room away from partition
Looped Vent
Portion of the vent pipe system where liquid wastes regularly flows
Wet Vent
Extension of a soil or waste stack above the highest horizontal drain connected to the stack
Stack Vent
Vertical vent pipe installed primarily for providing circulation of air to and from any part of the soil and waste of the drainage system
Vent Stack
This can be attributed to inadequate ventilation of the trap and the subsequent minus and plus pressures inside the system
Trap Seal Loss
Results of minus pressure in the drainage system
Siphonage
Cause by plus pressure
Back pressure
Considered a minor problem and less probable to drain the water inside the trap
Evaporation
Wind velocity passing over the top of the soil pipe may affect the trap seal
Wind Effect
Draining of water seal caused by foreign objects like thread or string suspended and extended over the outlet arm of the trap
Capillary Action
Due to the effect of atmospheric pressure and or gravity
Retardation of Flow
Watertight covered receptacle designed and constructed to receive the discharge of sewage from a building sewer
Septic tanks
Solid organic matter that are denser than water and settle at the bottom of the septic tank
Sludge
Lighter organic material that rise to the surface of the water
Scum
Liquid content of sewage
Effluent
Bacteria that relies on oxygen to survive
Aerobic Bacteria
Bacteria that can survive in places without oxygen
Anaerobic Bacteria
Storm water system that brings collected water directly to the water reservoirs; Separate System
Independent System
Combines storm water with sanitary system
Combined System
System that rainwater is collected in cisterns
Natural System
Usually located along the entire perimeter of the roof
Gutter
Located every 8 to 10 meters and at every corner of the roof
Downspout
Drain designed to receive water collecting on the surface of a roof and to discharge it into a downspout
Stained or Roof drain
At the bottom of the roof leader to direct rain water towards the nearest catch basin
Shoe
Delivers water to the sewers in the street via gravity
Catch basin
Connects to each catch basin
Storm line
Carries only rainwater collected from the storm drain or from the streets
Storm sewers
Manhole depth
2 to 3 meters
Manhole diameter
0.6 to 1.2 meters
Waste water with the exception of human waste
Gray Water
Water plus solid and liquid human waste
Black water
Rain water only
Storm Water
