How to maintain drainage systems properly
Regular maintenance, inspection and cleaning are also essential for the smooth operation of drainage systems. DIN 1986-3 sets out all the key measures for self-inspection, maintenance and inspection of floor drains.
Particularly in the case of floor drains and channels with fire protection elements, it is important to regularly check that the odour trap is correctly seated and that the water seal is present. The reason for this is that the water seal is crucial for the correct functioning of the fire protection element.
| System component | Measure | Implementation | Timeframe | |
| A. Drainage fixtures | ||||
| A.1 | Drains with odour traps | Inspection / Maintenance | Check the water level in the odour traps; top up with water if the permissible water level reduction is exceeded. Perform cleaning on odour traps carrying waste water. | Every 1 month or more frequently if necessary |
| A.2 | Drains without odour traps | Inspection / Maintenance | Check for unobstructed inflow and outflow. Cleaning traps and openings in the inlet grates, particularly for courtyard and basement drains. | Every 6 months or at shorter intervals as required |
| A.3 | Drains with light liquid traps in accordance with DIN EN 1253-5 | Inspection / Maintenance | Check that the automatic shut-off operates smoothly and inspect the sealing surfaces of the shut-off. Remove sand and other deposits from the inlet chamber. If the trap is removed for maintenance purposes, it must be refilled with water afterwards. The trap must be filled with water when in operation. The manufacturer’s instructions for installation, operation and maintenance must be followed. | Every 6 months or at shorter intervals as required |
| A.4 | Roof drains (restricted and unrestricted) and emergency overflows | inspection | Check that the inlet and drain, including the emergency overflows, are unobstructed. Perform cleaning of the dirt traps and inlet grates. | Every 6 months, particularly in autumn |
| maintenance | Functional check of the heating system. For roof drains serving the pressure drainage system, ensure that the functional components are correctly seated. For restricted drains, additionally check the functionality of the restrictor insert. | |||
| A.5 | Gutters / Rainwater downpipes | inspection | Check for proper condition, cleanliness and protective coating. | Every 6 months, particularly in autumn |
| maintenance | Check expansion joints and length compensators; perform cleaning of channels, valleys, eaves and leaf guards. Check that the heating system is working properly. | |||
| A.6 | Odour traps not covered by A.1 | inspection | Check the water level in the odour traps; top up with water if the permissible reduction in water level is exceeded. | if necessary |
| maintenance | Cleaning of rainwater pipe odour traps. Cleaning of waste water odour traps | Annually or at shorter intervals as required |
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