main drain
Central sewage pipe
The main drain is the primary pipe that carries wastewater from a building to the sewer or septic system.
All smaller drains—from sinks, toilets, showers—eventually feed into it.
When the main drain clogs, nothing flows: The plumber said tree roots had cracked the main drain.
In British slang, down the main drain means wasted or lost, like money or effort disappearing irretrievably.
- sewerUnderground drainage pipe
- sewer linePipe conveying municipal wastewater
- pipeHollow conveyance channel
- clogBlock or wooden shoe
- plumberWater system tradesperson
blockage · gutter · sewage · backup · overflow · standing water · snake · rooter · tree roots · basement · flood · waste · underground · cleanout · trap · cesspool · septic · septic tank
- plumbingpipes, valves, fittings, faucets, pipe
- drainagedrainpipe, sewer, sewers, storm sewer, vent stack
- poolsswimming pool, public pool, private pool, lap pool, heated pool
main drainbranch line
Secondary railway from trunk
inlet pipe · water main · supply line · water supply · feeder line
main, drain, mainly, mains, drains, drained, draining, drainage, drainer