How to Seal Collection Systems Efficiently?

It was a brilliant idea of the inventors of the SANIPOR® Flood Grouting technology to let liquids defeat water migration through leaking collection systems. Fluid geo-technical grouts can automatically penetrate through leaks into pipe bedding materials - and make them watertight. All that has to be created, is a closed vessel which can be filled while hydrostatic pressure builds up - as the necessary injection force.

Flooding with fluid SANIPOR® components is comparable with the standardized leak testing with water (EN1610). From the initial to the final leakage rate the drop of  liquid grouts are measured constantly during the execution.

The Procedure

Step 1

After a CCTV inspection survey and jetting, the section to be treated is plugged with inflatable plugs.


Manhole, sewer, laterals are filled with solution S1 which penetrates through defects into the surrounding ground.

The drop of S1 in the manhole is measured and recorded constantly. 


After a duration time of  30-60 minutes solution S1 is rapidly pumped out, leaving defect zones saturated.

Sanipor Step 1 S1

Step 2

After rapid flushing, the section is immediately refilled with solution S2 which reacts with S1 in the ground.                           

This starts to form a concrete-like matrix, binding soil particles and sealing all leaks with solidified ground around the defects.

The drop of S2 in the manholes slows down and is recorded in the sealing protocol as well. If it comes to halt the watertightness is made visible - a built in "hydro-test".

When the reaction is complete and the watertightness established, solution S2 is pumped out. Otherwise the procedure has to be repeated, S1 and S2 flooded again, until the required allowance rate of the given standard is achieved. 

After flushing, the sewer is returned to service.

The pipe´s structure is protected by the soil-grout- envelope from further deterioration. 

Sanipor Step 2 S2
Elimination of Ex Infiltration