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Drainage: A Glossary of Terms

The glossary is a handy reference guide to key terms and concepts related to drainage systems. Here, you will find clear and concise definitions that will help you understand the principles of water management, different types of drainage solutions, and their specific features. Whether you are new to the topic or an experienced professional, this glossary serves as a valuable resource for understanding the essentials of drainage technology.
A
Acidic wastewater
Activated carbon filter
Activated sludge
Adoption of Sewers
Advanced Oxidation Process (AOP)
Aeration Tank
Aerobic Bacteria
Aerotolerant Organisms
Aesthetic Pollution
Air Admittance Valve
Air gap
Air Lift Pump
Air Release Valve
Air scouring
Airburst Pipe Cleaning
Alkalinity
Anaerobic Bacteria
Anaerobic Contact Process
Anaerobic digestion
Anaerobic filter
Aniline Dye Test
Anoxic zone
Aquifer Recharge Well
Asset Mapping (Drainage)
Attenuation Tank
Auto-Samplers
B
Back drop
Back Inlet Gully
Back siphonage
Backfall
Backfill Material
Backflow Alarm System
Backflow preventer
Backflow Testing
Backwater Valve
Bacteria
Baffle Chamber
Baffle Plate
Ball valve
Bar screen
Batch reactor
Bedding material
Bell-and-spigot joint
Bench Flow Channel
Bentonite Seal
Binding Rules
Bioaugmentation
Biochemical Oxygen Demand (BOD)
Biofilm
Biofilter
Biogas
Biogas Flare System
Biological Filtration
Biological Nutrient Removal (BNR)
Biosolids
Biosparging
Bladder Obstruction Device
Blind Flange
Blocked Drain
Blowdown Tank
Borehole Camera Inspection
Borehole Soakaway
Branch Connections / Lateral Connection
Break pressure tank
Breakout Pit
Bubble Diffuser
Buchan trap
Bunding
Bypass channel
Bypass Pipe
Bypass Pumping
C
Carbon footprint
Carbon Odour Filter
Carrying capacity
Catch basin
Catchment
Catchment Pit
Catchwater Drain
Cathodic Protection
CCTV Push Rod Camera
CCTV Survey
Centrifuge
Cesspool
Chamber trap
Channel Drain
Channel Erosion
Channel Grinder
Check Chamber
Chemical dosing
Chemical oxygen demand (COD)
Chemical precipitation
Chemical Root Treatment
Chemical Storage Tank
Chlorination
Chute Connection
CIPP (Cured-In-Place Pipe)
Clarified Effluent
Clarifier
Cleanout
Clinker
Clinker Bed
Closed Drain System
Closed-Circuit Flushing
Coanda Screen
Coarse Bubble Aeration
Coarse Screen
Collection System
Collector Sewer
Combined heat and power (CHP)
Combined Heat and Power Sludge Treatment
Combined inflow
Combined Network
Combined Sewer
Combined Sewer Overflow
Combined Sewer Overflow (CSO)
Combined Sewer Relief Valve
Composite liner
Concrete Encasement
Condensate Drain Line
Condition Grading (Pipes)
Confined Space Entry System
Confined Space Ventilation
Constructed wetland
Contact tank
Containment Bund
Continuous Flow Reactor
Contributing Area
Control Structure
Conveyance Capacity
Corrosion Rate
Corrosion Resistant Lining
Cross Drain
Cross-connection
Crossfall Drainage
Crown of sewer
Crust formation
Culverts
Cut-and-Cover Sewer Construction
Cutting Jet Nozzle
Cyclic Flushing System
D
De-watering
Dead-End Sewer
Debris Basket
Debris Extraction Unit
Debris screen
Debris Trap
Decanting System
Deep Manhole
Deep Sewer Cleaning
Depression Storage
Desiccation Cracking
Desilting
Desludging
Desludging Pump
Detention Basin
Detention Tanks
Detention Tanks (Balancing Tanks)
Dewatered sludge
Diffused aeration
Diffuser
Dig-Up Repair
Directional Cleaning
Discharge
Discharge permit
Discharging
Disinfection Chamber
Dome Grate
Domestic Foul Wastewater
Domestic Wastewater
Drain
Drain Air Testing
Drain auger
Drain Coupling
Drain Mapping Survey
Drain Rehabilitation
Drain Reinforcement Sleeve
Drain rod
Drain Sleeve
Drain Tracing
Drain Vent Pipe
Drainage
Drainage Easement
Drainage field
Drainage Infiltration Basin
Drains/drainage
Drop manhole
Drop Shaft
Drop Structure
Dry Flow Channel
Dry weather flow
Dry Well
Dye testing
Dynamic Flow Regulator
Dynamic Pressure Jetting
E
Effluent
Effluent polishing
Effluent Sampling Point
Ejector Pump System
Electro-Mechanical Cleaning
Electrocoagulation
Emergency Bunding
Emergency Overflow Route
Emergency Shut-off Valve
Emergency Tankering
Encrustation Removal
Energy Dissipation Chamber
Energy Dissipator
Energy Recovery Turbine
Environmental Compliance Monitoring
Equal Flow Splitter
Equalisation Lagoon
Equalisation tank
Erosion
Erosion control blanket
Eutrophication
Evaporation
Evapotranspiration
Event (rainfall)
Exfiltration
Expansion Joint
Extended aeration
External Drop Connection
Extreme event
F
Facultative anaerobes
Fat Skimmer
Fatberg
Filamentous Growth
Filter Drain Curtain
Filter Media
Filter press
Filter Sock
Fine Bubble Aeration
Flap gate
Float Switch
Flood Defence Wall
Flood storage pond
Floodplain
Flow Attenuation Device
Flow Balancing Chamber
Flow Control Valve
Flow Diversion Chamber
Flow Equaliser
Flow meter
Flow Monitoring Station
Flow regime
Flow restrictor
Flow Splitter Chamber
Flush chamber
Flush Valve Chamber
Foam Root Treatment
FOG
Forced Air Ventilation Unit
Forced Main
Foul Air Ventilation System
Foul Drain Vent
Foul sewage
Foul system
Foul water
Freeboard
French drain (filter drain)
Friction Loss in Pipes
G
Gas holder
Gatic Cover
General binding rules
Geotextile filter
Gradient
Gravity system
Gravity-Fed Sewer
Grease interceptor
Grease Management System
Grease Recovery Unit
Grease Removal System
Grease trap
Greywater
Grit chamber
Gross solids
Groundwater Ingress
Groundwater Monitoring Well
Groundwater Relief Valve
Grout Injection Repair
Grouting
Gully
Gully Pot Filter
H
Head Loss
Head-discharge
Headwall
Headworks
Helical Pipe Bursting
High-Level Overflow (HLO)
High-pressure water jetting
Highway drainage system
Holding tank
House purchase survey
Hydraulic analysis
Hydraulic Backflushing
Hydraulic capacity
Hydraulic gradient
Hydraulic Head Loss
Hydraulic jump
Hydraulic Modelling
Hydraulic performance
Hydraulic Retention Time (HRT)
Hydraulic simulation
Hydrocarbon Separator
Hydrograph
Hydrostatic Lateral Testing
Hydrostatic Testing
I
Impermeable surface
Industrial discharge
Infiltration
Infiltration Chamber
Infiltration gallery
Infiltration to sewer
Infiltration Trench
Inflatable packer
Inflow
Inflow Reduction
Inlet
Inlet Chamber
Inline trap
Inspection chamber
Inspection Port
Interception
Interceptor sewer
Interceptor traps
Inversion lining
Invert
Inverted siphon
Isolation Valve
J
Jet-Vac Combination Unit
Jetting
Jetting Hose Reel
Jetting Nozzle Spinner
Jetting Trailer
L
Lagoon
Lamella clarifier
Laminar Flow Regime
Laminate Pipe Liner
Land drains
Lateral
Lateral drains
Leach field
Leachate Collection System
Leak Detection Sensor
Leaking Joint Detection
Lift station
Lime Stabilisation
Liner Calibration Tube
Lining
Localised Structural Repair (LSR)
Longitudinal fracture
Low-Impact Development (LID)
Low-Pressure Sewer System
M
Macerator
Main drain connection
Main sewer
Mainline CCTV Robot
Mainline sewer
Major system
Manhole
Manhole Benching
Manhole Flow Screen
Manhole Insert Seal
Manhole Rehabilitation
Mechanical Bar Rake
Mechanical Debris Extractor
Membrane bioreactor (MBR)
Methane recovery
Micro-CIPP Repair
Microaerophiles
Microjet Cutting
Microscreen
Minor system
Misconnection
Modular Treatment Unit
Moling
N
Network
Non-Potable Water System
Non-return valve
O
Obligate aerobes
Obstruction
Odour Control Biofilter
Odour control unit (OCU)
Odour Locking System
Odour Neutralising System
Odour scrubber
Off-line tank
Oil interceptor
Oil-water separator
Operator
Orifice
Outfall
Outfall sewer
Overflow
Overflow Bypass Channel
Overflow channel
Overflow Relief Sewer
Overflow weir
Overland flow
Overpumping System
P
P-trap Ventilation
Patch liner
Patch lining
Patching
Peak discharge
Percentage runoff
Percolation
Percolation Test
Perforated Lateral Pipe
Perimeter Drain System
Permeable paving
Pervious surface
Petrol interceptor
Phosphorus removal
Picote
Pipe Alignment Survey
Pipe bursting
Pipe Deflection Measurement
Pipe Joint Deflection
Pipe Lubricant
Pipe Ovality
Pipe Scaling Removal
Pipe Wall Thickness Test
Pitch fibre pipework
Pneumatic Pipe Plug
Point rainfall
Pollutant
Pollution
Ponding
Pop-up valve
Pre-treatment
Pressure Drain Cleaning
Pressure Grouting
Pressure Relief Manhole
Pressure sewer system
Primary treatment
Private sewage system
Private sewer
Public sewer
Pump
Pumping station
R
Radial fracture
Rag Screening Unit
Raingauge
Rainwater Downpipe
Rainwater harvesting
Rat blocker
Rational method
Re-rounding
Receiving waters
Recessed manhole cover
Redundant drain
Reed bed system
Reforming
Regulator
Rehydration Pit
Remote Monitoring Unit
Reservoir storage
Resin Impregnation Unit
Rest bend
Retention basin
Retention pond
Retention time
Reticulation System
Rising main
Rodding access
Rodent Valve
Root Cutting Robot
Root ingress
Runoff
S
Sand filter
Scour valve
Screen
Scum removal
Scumboard
Secondary treatment
Sediment Flushing Gate
Sediment transport
Sedimentation
Self-cleansing (velocity)
Separate system
Septic Effluent Filter
Septic tank
Settlement chamber
Settlement tank
Sewage
Sewage treatment plant
Sewage water
Sewer
Sewer Air Pressure Valve
Sewer Capacity Analysis
Sewer flooding
Sewer Flushing Tank
Sewer Gas Detector
Sewerage
Sewerage system
Sewerage undertaker
Sheet Piling / Shoring
Side weir
Silt
Sludge
Sludge digester
Sludge Thickening Tank
Sluice gate
Smart Flow Sensor
Smart Manhole Cover
Snaking
Soakaway
Soffit
Soil and vent pipe / vent stack
Soil moisture deficit (SMD)
Soil Permeability Test
Source control
Spill event
Stilling pond
Storage
Storm tanks
Storm tanks / storm drains
Stormwater Bypass System
Stormwater detention
Stormwater Interceptor
Stormwater Lift Station
Stormwater overflow
Stormwater Quality Unit (SQU)
Structural lining / re-lining
Stub stack
Sub-catchment
Submersible Mixer
Subsurface Drainage System
Sump pump
Surcharge Level
Surface washoff
Surface water
Surface water system
Surface water/rainwater
Surge Control Tank
Suspended solids
Sustainable drainage (SUDS)
Swale
Swan neck
T
Tank inspections
Tank sewer
Tertiary treatment
Thermal CIPP
Time of entry
Trap
Treatment plant
Trench Shoring System
Trenchless Point Repair
Trickling filter
U
U-Bend
Ultraviolet disinfection
Urban drainage
V
Vacuum Breaker Valve
Vacuum sewerage system
Vacuum tanker
Vacuum truck
Vacuum Valve
Vortex overflow
W
Washoff (of pollutants)
Wastewater
Wastewater Reuse System
Water Hammer Effect
Water quality
Water table
Watercourse
Weir
Wet Weather Storage Tank
Wet well
Wetland buffer
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