Drain Cleaning
Main Building Trap (Siphon Chamber)
Underground inspection chamber on the ground floor that traps odors and solids before connecting to the municipal sewer.
What is Main Building Trap (Siphon Chamber)?
The siphon chamber is a concrete or PVC inspection box located at the end of the building's drainage network. It creates a hydraulic seal so sewer gases do not enter the apartments.
When you encounter it in an emergency & typical cost
When clogged with wet wipes or grease, it causes sewage backups on ground floors. Periodic cleaning: €120-220.
Arrival within 20-35 minutes
Related technical terms
High-Pressure Jetting & Vacuum Truck →
Heavy-duty vehicle equipped with a 200-bar water jetting pump and vacuum tank to clear main sewers and septic tanks.
CCTV Drain Inspection Camera →
Robotic fiber-optic camera probe that locates pipe breaks, tree roots, or blockages without digging up the floor.