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Glossary
Drinking water
Density
Glossary
Drinking water
30-second rule
Branch flow
External heat transfer coefficient
Connection fitting
Share of pressure losses in the total pressure loss
Apparatus pressure loss
Outlet temperature of a section
Discharge time
Outer diameter of the insulation
Calculated flow rate
Bernoulli equation
Operating pressure
Reference storey
Insulation layer thickness
Continuous flow rate
Ceiling thickness
Density
Throttle valve
Pressure reducer
Pressure difference due to individual resistances
Pressure surge
Pressure loss
Pressure loss due to geodetic height difference
Pressure loss in the flow-through drinking water heater
Pressure loss from pipe friction and individual resistances
Pressure loss, given
Pressure loss in a group domestic hot water heater
Pressure loss in the service connection
Pressure loss in a ring main
Pressure loss due to pipe friction
Pressure loss in a non-return valve
Pressure loss in the water meter
Pressure loss in a circulation regulating valve
Flow rate
Flow rate
Dynamic viscosity
Dynamic flow splitter
Inlet temperature of a section
Individual consumers
Individual resistor
Individual supply line
Drain valve
Tap fitting
Filters
Flow pressure
Flow velocity
Flow direction
Flow path
Flow path number
Delivery pressure of the circulation pump
Flow rate of the circulation pump
Floor structure
Given flow rate in the appliance
Geodetic height difference
Storey width
Storey height
Trade
Simultaneity
Main shut-off device
House connection
House connection group
Hydraulic balancing (DHW)
Hygiene plan
Hygiene technology
Inliner
Chilled water cooler
Cold water regulating valve
Cold water circulation
Kinematic viscosity
Comfort classes
Constant
K
v
value
Extinguishing water pipe
Maximum resting pressure at taps
Measuring device
Minimum flow rate
Minimum flow pressure
Minimum supply pressure
Mixed consumers
Average flow velocity (flow velocity)
Mean pressure drop
Nominal diameter
Utilisation unit
Type of use
Upper flow rate
Top edge of finished floor
Sampling point / sampling valve
Product sequence
PWC discharge time
PWC temperature after maximum stagnation time
PWC temperature in summer
PWC temperature in winter
PWC temperature rise time
Room book
Rules for pressure boosting
Reynolds number
Pipe type
Pipe sequence
Ring main
Ring network
Outer pipe diameter
Outer pipe diameter of an insulated pipe
Pipe inside diameter
Pipe length
Total pipe length
Pipe cross-sectional area
Pipe roughness
Pipe friction pressure gradient
Pipe friction coefficient
Backflow preventer
Resting pressure
Sanitary installation
Safety fitting
Storage tank outlet temperature
Specific heat capacity of water
Specific heat flow
Specific heat loss
Peak flow rate
Maximum stagnation time
Static regulating valve
Rising/falling pipe
Control valve
Floor installation with individual supply lines / branch lines
Storey installation with series pipework
Storey installation with ring main
Floor installation with ring main and flow splitter
Floor pipe
Streamline
Total flow rate
Sum of pressure losses from regulating devices
Section
Section designation
Section length
Section number
Section type
Temperature difference of the DHW hot water in the DHW pipe
Temperature difference of the hot drinking water at the drinking water heater
Thermal disinfection
Thermostatic regulating valve
Drinking water
Potable water cold
Potable water pipe hot
Ambient temperature
Valve
Consumption pipe
Available pressure difference
Available pipe friction pressure gradient
Intermeshed pipe network
Distribution line (collective supply line)
Branched pipe network
Connecting component
Distribution pipe
Volume flow
Heat transfer coefficient of an insulated pipework
Thermal conductivity
Heat loss
Heat loss in the branch circuit
Heat loss in the through path
Heat loss of the circulation section in the flow direction downstream of a mixing point
Wall thickness (pipe)
Water softener
Water temperature
Water supply companies
Water meter
Water meter system
Material
Drag coefficient
Central DHW heating
Circulation flow rate
Circulation circuit
Cold drinking water circulation pipe
DHW hot circulation pipe
Waste water
Heating
Density
Density of a substance at a given temperature.
Symbol or abbreviation:
ρ
Usual unit:
kg/m
3
