basement

blue

building

centrifugal

chemicals

construction

desalination

dirty

effluent

electric

environment

equipment

filter

filtering

flange

fluid

green

indoors

industrial

industry

infrastructure

machinery

motors

pipe

pipeline

plumbing

process

production

pump

purification

room

rust

small

station

steel

sump

system

town

treatment

utility

valves

water

waterpumps

white

yellow