Drainage and rain water pipes run alongside each other in the same trench. The water flows into the basic water drains from which they lead to the municipal storm water chambers. Underground drainage chambers are located in the corner of each building. These serve as the inspection and maintenance drains of the underground drainage pipes. Generally, rain water is also lead to the same basic water chambers, in which case the drainage pipe connections have ball valves to prevent water from flowing back into the drainage pipes during a flood.
Uponor underground drainage systems include everything needed for the construction of a functional and safe system:
- Underground drainage pipe 110 SN 8
- Underground drainage chamber 315 and raise component
- Flexible connections
- Yard chamber package

When left uncontrolled, rain and melt water can cause pooling and slippery sheets of ice. Over time, this can result in moisture damage to structures.
Rain water, otherwise known as storm water, must not be allowed to flow into underground chambers. This is because heavy rain will fill the chamber, which will in turn begin to push water into the building foundations, causing the pipes to work in exactly the opposite way they should. This will also happen if discharge pipes become blocked, such as by freezing up. Storm water systems are built to discharge rain water safely and to the correct place.
The Uponor storm water system includes the following components:
- Storm water pipe 110 SN 8
- Sealing rings
- Drainage chambers
- Flexible connections
- Yard chamber package

