Sanitary Piping and Storm Drain System

Mostly Sanitary Piping, this is for Building Utility Quiz for University of Santo Tomas 11/27/2024

Sanitary System or Sanitary Plumbing

the system of drain pipes which convey foul water from a building to an on-site sewage disposal or sewer

Gravity

Sewage flow travels entirely by _____, thus requires “easy” downward bends such as 22 1⁄2o, 45o, 60o fittings

1-2%

The slope toward the point of disposal is how many percent

Waste Stacks

Drainpipes stood on end and carrying nothing but dirty water from sinks and the likes

Soil Stacks

Drainpipes stood on end carrying human excreta along with water

Vent Stacks

Vent pipes extended through the roof in order to admit air to, and discharge gases from, the sanitary piping system

Branch Waste Lines

Waste pipes that are slightly pitched from the horizontal and connect to a stack

Branch Soil Lines/Horizontal Branch

A soil or horizontal of pipe which has one or more branches

Vents

A pipe installed to provide a flow of air to or from a drainage system or to provide a circulation of air within such system to protect trap seals from siphonage and back pressure

Branch Vents

Drainpipes that are slightly pitched from the horizontal and connect to a stack or the main building drain

The Sovent System

This essentially ventless system changes the nature of the effluent (the wastes discharged from the fixtures) instead of coping with the pressures & suctions that normal effluent would cause

Floor Drains

A trapped outlet fitting for the floor of a wet area, garage etc., through which waste water and other fluids are conveyed into a drain

Clean-Outs

A pipe fitting with a removable plug which provides access for inspection or cleaning of the pipe run

Clean-Outs

Also called an “access eye” or “cleaning eye”

15 meters

Clean-Outs shall be provided at each horizontal drainage pipe, at its upper terminal, and each run of piping more than _____ in length

Opens in the direction of flow

Clean-Outs Shall be installed so it __________ of the soil or waste line or at right angles thereto

Vertically above

Cleanouts, for wye branch & end-of-line, shall be installed __________ the flow line of the pipe

38mm

Size of clean out for 38mm pipe size

38mm

Size of clean out for 51mm pipe size

64mm

Size of clean out for 64mm pipe size

64mm

Size of clean out for 76mm pipe size

89mm

Size of clean out for 102mm pipe size or larger

Fresh-air Inlets

an opening to allow the entrance of fresh air to a drainage system

152mm

Galvanized Wrought & Steel Pipe shall not be used underground and shall be kept at least ______ above ground

Cast Iron Piping

Sanitary Piping Material that can be HUBLESS

pressurized

Vitrified Clay Pipe Shall not be used above ground or whenever a piping is _____ and shall be kept at least 300mm below ground

300mm

Vitrified Clay Pipe Shall not be used above ground or whenever a piping is pressurized and shall be kept at least _____ below ground

Plastic Piping

This Sanitary Piping Material shall be used in high-rise buildings, provided that its use shall be the discretion of the Designer/Master Plumber

Pipe Sizing

Shall be based from the “total fixture units” connected thereto

32mm

Pipe Sizing for 1 Fixture Unit

38mm

Pipe Sizing for 3 Fixture Unit

51mm

Pipe Sizing for 4 Fixture Unit

76mm

Pipe Sizing for 6 Fixture Unit

102mm

Pipe Sizing for 8 Fixture Unit

38mm, 2 units

Trap and Arm Size and Fixture Units for Bathtubs

38mm, 2 units

Trap and Arm Size and Fixture Units for Bidets

51mm, 2 units

Trap and Arm Size and Fixture Units for Floor Drains

Embedded Metal Pipe Sleeves

Protection of Piping

for pipes passing under/thru walls

Polyethylene Sheath Casting

Protection of Piping

for pipes passing or under cinders or other corrosive materials

Bitumen

Protection of Piping

for void b/w pipes and sleeves thru concrete floors in the ground

at every storey or closer

Hangers & Support (Vertical Piping)

Cast Iron Soil Pipe

not less than every storey ht.

Hangers & Support (Vertical Piping)

Screwed Pipe

at each storey/ every 3.00 meters (max interval)

Hangers & Support (Vertical Piping)

Copper

at 1.20 meters interval (max) w/ rigid vertical back-up

Hangers & Support (Vertical Piping)

Lead

at 1.00 meter interval

Hangers & Support (Vertical Piping)

Plastic

at 1.50m interval (max)

Hangers & Support (Horizontal Piping)

Cast Iron Pipe

at 3.00m intervals (=>19mm)

at 3.60m intervals (=<25mm)

Hangers & Support (Horizontal Piping)

Screwed Pipe

at 1.80m interval (=>38mm)

at 3.00m interval (=<51mm)

Hangers & Support (Horizontal Piping)

Copper

by stiff metal/wooden backing for its entire length

Hangers & Support (Horizontal Piping)

Lead

by stiff metal/wooden backing for its entire length for 38mm & smaller without backings for larger tubings

Hangers & Support (Horizontal Piping)

Plastic

Sewage Disposal System

The screening, sedimentation, filtration etc. of waste water and solids from a sewer, and the disposal of settled sludge in digestion tanks or on drying beds

On-site System

Septic Tank, Aerobic Treatment Unit, Sewage Treatment Plant are what type of Sewage Disposal System?

Off-site system

Sewer System are what type of Sewage Disposal System?

2.00m³

Minimum Volume Capacity of Septic Tank

0.90m x 1.50m

Minimum Size of Septic Tank

2

Number of compartments used in Septic Tanks

½ to 2/3

The first compartment of a septic tank shall have __________ of the volume of the tank

0.60m

Minimum liquid depth of Septic Tank

1.80m

Maximum liquid depth of Septic Tank

200mm

Vertical distance of the air gap of septic tank is at least?

50.80mm

In Septic Tank, The invert of the inlet pipe shall be at least not less than _____ above the invert of the outlet pipe

Desludging Equipment

Septic Tank have Manholes to be accessible to _____

Partitions or baffles

Septic Tank- Waste flow thru the tank by gravity

_____ are provided inside the tank to prevent sewage from passing directly from the inflow to the outflow

Anaerobic bacteria

Type of bacteria that do not require oxygen and are very important in dissolving solid waste (from scum to sludge)

Interceptors or Seperator

A device installed to prevent waste discharge that can cause problems at the sewer or private disposal storage

Aerobic Bacteria

Type of bacteria that are oxygen dependent and therefore very important for dissolving solid waste (from scum to sludge) in an open sewage disposal system

Sludge

Any matter not dissolved sinks to the bottom of the tank, these matters are called?

Aerobic Treatment Unit (ATU)

Alternative for Septic Tank

Aerobic Treatment Unit (ATU)

Depend upon air bubbled through the sewage to achieve aerobic digestion, which is faster than anaerobic digestion; hence, they can be smaller than septic tanks

Sewage Treatment Plant (STP)

the apparatus, vessels and pumps, filters, pipework etc. for treating raw sewage

Sewer System

A system which conveys waste liquids and solids in suspension away from a building’s soil and foul water drainage systems to a treatment plant;

sewage ejector pump

A ______ must be used in case the sewer line is much higher than the building sewer outlet/drain

Storm Sewer

Elements of a Storm Drain System

Exterior piping that conveys building storm water to a point of disposal. Begins outside of a building with the connection of a building storm drain

Building Storm Drain

Elements of a Storm Drain System

Interior Horizontal drainage system that connects to branch piping and vertical conductors. Conveys storm water to the storm sewer

Leader

Elements of a Storm Drain System

Located outside of a building, Conveys storm water vertically from upper-horizontal storm drain piping to a building storm sewer

Conductor

Elements of a Storm Drain System

Located outside of a building, Conveys storm water vertically from upper-horizontal storm drain piping to a building storm drain

Horizontal Branch

Elements of a Storm Drain System

Horizontal-Interior piping that connects roof drains or similar inlet points to a conductor or building storm drain

Roof Drain

Elements of a Storm Drain System

A drain designed to receive water collecting on the surface of a roof and so to discharge it into a leader or downsprout

Scupper

Elements of a Storm Drain System

An opening in the side of a building, as in a parapet, for draining off rainwater

Gutter

Elements of a Storm Drain System

A channel of metal or wood at the eaves or on the roof of a building, for carrying off rainwater. Also called eaves trough

Leader head

Elements of a Storm Drain System

The boxlike head of a downspout connected to a scupper or gutter

downspout

Elements of a Storm Drain System

A vertical; pipe for conveying rainwater down from a roof or gutter to the ground. Also called drainspout leeader

Shoe

Elements of a Storm Drain System

the base of a downspout, curved outward to direct the flow away from the wall

Splash Block

Elements of a Storm Drain System

A procast concrete block having a depressed splayed surface, placed at the base of a downspout to disperse rainwater that would otherwise erode the soil