[ 15.03.2026 ]
How inversion sanitation works: a detailed guide to SP!RES technology
Inversion sanitation is a trenchless pipe restoration method that allows you to create a new pipe inside an old one without excavation and dismantling. In this article, we will analyze in detail the physics of the process, the stages of operation of the SP!RES system and answer the questions that our customers most often ask.
If you want to understand exactly how technology is changing the rules of the game in sewer system repair, this material is for you.
What is inversion sanitation?
Inversion (from Latin inversio - inversion) is the process of turning a flexible sleeve (liner) under pressure inside a damaged pipeline. Unlike traditional broaching methods, where the material is simply dragged through the pipe, inversion allows the liner to fit snugly against the walls, repeating all bends and irregularities, including branches and joint zones.
The SP!RES system uses this method, complementing it with intelligent control and parameter monitoring in real time.
Stage 1: Preparation and diagnosis
The first stage includes inspection of the network, cleaning of the pipe and selection of a liner suitable for diameter, length and operating conditions. Accurate diagnosis is important because it determines the geometry of the new inner pipe.
This is where the overall result is laid down: the fewer mistakes at the start, the better the polymerization and the final geometry of the restored section.
Key learning outcomes:
- Your employees work confidently with the SP!RES system
- The human factor is eliminated due to the understanding of automated processes
- Improving customer service quality
- Official certification of specialists
The SP!RES system uses this method, complementing it with intelligent control and parameter monitoring in real time.
Stage 2: Broaching the liner in a straight position
After preparation, the liner is installed and the inversion process begins. The sleeve is turned inside out under controlled pressure, gradually filling the cavity of the old pipe and taking its shape. The process must be steady: too much pressure can damage the material, while insufficient pressure will not provide the required fit.
The SP!RES system uses this method, complementing it with intelligent control and parameter monitoring in real time.
Specifications:
| Diameter (nominal) | DN100 |
|---|---|
| Wall thickness after polymerization | 4 mm |
| Length (available options) | 3 m, 6 m, 9 m, 12 m |
| Base material | Polyester (PES) |
| Resin Type | Heat-cured (unsaturated polyester) |
| Polymerization time at 80°C | 60 minutes |
| Max. operating temperature | +50°C (short-term up to +80°C) |
| Stiffness class | SN4 (on request SN8) |
| Display color | White (outer layer), blue (marker) |
| Packaging | Vacuum packaging + thermal container |