Kanalbau-Wissen to go!

* d_BL = drill-hole diameter

This information is only about connections that are made at a building site using a drill.

First, determine if the pipe type can be drilled. If it can, determine the location where drilling is permitted. Always follow the manufacturer’s specifications!

You must always use a core drill bit to make an opening for a connection. Using a hammer and chisel is not permitted.

New openings for connections must be made using a suitable core drill.

1 Drill motor (electric) 
2 Handle 
3 Water connection 
4 Feed handwheel 
5 Diamond core drill bit for concrete or stoneware

Core drill bits for plastic generally have finer teeth and a centring drill.

The lateral drains connect with the public sewer at a height that is determined by structural aspects (profile type and diameter) and operational aspects.

The bottom 1 of the connection should be located between the widest point 2 and top 3 of the main sewer and should be higher than the water level during dry weather flow.

Ideally, the connection should be between 10 and 11 o’clock or between 1 and 2 o’clock.

This corresponds to an angle of ±45 degrees to the longitudinal axis of the pipe.

The same rules apply for pipes that are “egg-shaped” in cross-section.

For these pipes, too, the connection height should be between 9 and 3 o’clock.

The drill hole for the pipe connector must be made at a 90-degree angle to the longitudinal axis (i.e. towards the central axis) of the main sewer.

 

It is preferable here to use suitable connector systems that offer structural protection for the steel reinforcement.

The connection can be made using moulded connectors or saddle connectors.

Moulded connectors are components that are inserted into the round openings drilled into the pipe. They provide a tight seal. Installation details for moulded connectors can be found in the manufacturer’s instructions.

 

 

Saddle connectors are components that create a sealed connection between the external surface of the pipe and the internal surface of the saddle flange.

Installation details for saddle connectors can be found in the manufacturer’s instructions.

Use extreme caution when compacting soil near connections. The backfill material must be carefully placed underneath the pipe by hand and compacted according to the foreperson’s instructions.

Lateral drains must be configured and connected so that they can withstand movement. It is important to take into account possible subsidence and the resulting load on the connection area.