4 inches
barrel
cesspit
cesspool
cistern
cleaner
connector
drain
drainage
feces
flexible
home septic tank
hose
house
hygiene
long
lorry
maintenance
manure
open hatch
outdoors
pipe
pipeline
pump
pumping
pvc suction hose
quick coupler
sanitary
sanitation
septic
server
service
sewage
sewage drain
sewerage
shit
sludge
stench
storage
suck liquids
suction
tank
tanker
truck
trucking
tube
vacuum
vacuum truck
waste
wastewater