HDPE technical guides · 06
Geberit PE SuperTube
Optimise wastewater stacks in buildings with several floors.
Geberit HDPE SuperTube combines PE pipes with specially designed hydraulic fittings to organise flow and maintain an air passage in the stack. This can reduce service shaft space. It must be designed as a complete system while floors and branch connections are being coordinated.
The roles of Sovent, BottomTurn and BackFlip
The Sovent fitting organises wastewater entering the stack. BottomTurn provides the transition to a horizontal section, while BackFlip supports the return to a vertical run. These fittings have different hydraulic functions. Replacing them with ordinary fittings changes the network principle and requires the design to be reconsidered.
Understand the stated performance
For Geberit HDPE SuperTube d110, Geberit states a maximum flow of 12 l/s and horizontal sections up to 6 m without a fall in the specified configurations. Removing secondary ventilation does not mean eliminating all ventilation. Branch connections, primary ventilation and application limits must follow the system's design rules.
Coordinate shafts and offsets
Identify the floors served, connected appliances, available heights and changes of direction. Assess potential space savings together with other services, structural openings, acoustics and maintenance. Check the connection to the downstream collector as well. Designing the stack does not remove the need to assess the rest of the drainage network.
Build from a validated route
Fix the fitting references and positions on the drawings before prefabrication. Specify supports, joints and inspection access. Any branch or offset change should be referred to the designer. EDIFIS can help assemble the product selection and documents needed for this coordination, with availability confirmed against the required references.
Understand the SuperTube components
| Component or data | Function and scope |
|---|---|
| Sovent | Organises branch connections and flow within the stack. |
| BottomTurn | Transition from the stack to a horizontal section. |
| BackFlip | Return from a horizontal section to a vertical run. |
| d110 · 12 l/s | Stated maximum flow for the designed HDPE SuperTube system. |
| Up to 6 m | Horizontal length without a fall in permitted configurations. |
| Ventilation | No secondary ventilation in the intended system; primary ventilation still requires design. |
These figures concern Geberit HDPE SuperTube. They do not automatically apply to a conventional HDPE stack, Silent-db20 or another range carrying the SuperTube name.
Prepare for your project
- Plans and sections for all served floors.
- Connected appliances and flow assumptions.
- Shafts, offsets and available heights.
- Ventilation and downstream connection.
- Fitting references and validated route.
Frequently asked questions
Does a d110 PE pipe alone make a SuperTube system?
No. Performance depends on the special hydraulic fittings and design rules. A pipe of the same diameter does not reproduce the system's operation on its own.
Can all ventilation be removed?
No. The benefit concerns secondary ventilation in permitted configurations. Primary ventilation and appliance connections still need to follow the system design.
Does 12 l/s size the whole building?
No. It is a stated capacity for a system configuration. Branches, downstream pipework and building uses must also be sized appropriately.
HDPE documentation
Geberit PE and tools catalogue · PDF HDPE documentationGeberit technical references
Continue planning
Discuss your project with EDIFIS
Send the drawings and network constraints so we can identify components to review, useful documents and availability to confirm.