water seal
Drain gas blocker
A water seal is a trap in plumbing where standing water blocks sewer gases from entering a building—the U-bend under sinks and toilets holds water that acts as a barrier.
The term extends to any liquid barrier preventing gas passage: The chest tube has a water seal to let air escape without flowing back.
- gasketMechanical leak preventer
- plumbingWater and waste infrastructure
- P trapBent drain holding water seal
- trapDevice for catching animals
- drain pipeTube for waste removal
pipe · floor drain · airtight · watertight · siphon · drain · barrier · toilet · wax ring · flange · O-ring · compression · valve · hydraulic · moisture · prevention · leak · pond