background
blue
concrete
construction
consumption
control
counter
drop
elbow
energy
engineering
equipment
flow
gauge
home
house
indicator
industrial
industry
instrument
joint
knot
line
measure
measurement
mechanical
metal
meter
number
nut
object
old
pipe
pipeline
plastic
plumbing
pressure
sanitary
sewer
sewerage
supply
symbol
system
technology
tool
tube
valve
wall
water
water meter
wrench