broken
closing
cock
concept
construction
consumption
control
corroded
corrosion
crane
crisis
dirty
distribution
drain
dross
energy
equipment
faucet
fuel
gas
gasoline
grunge
hydrant
industrial
industry
isolated
metal
oil
old
petrol
pipe
pipeline
piping
plumb
plumbing
pump
rust
rusted
rusty
sanitary
stop
stopcock
tap
transit
transmission
tube
tubing
valve
waste
water