Sewage center Percolation test

Complete kit containing everything you need to perform percolation tests in pipes.

To assess which type of sewerage system is suitable for your site, you will need information about the soil and water on your site.

Peculation tests show how well the soil is able to infiltrate water over a long period of time.
The test gives a so-called LTAR value (Long Term Acceptance Rate), which describes the soil’s ability to absorb a certain number of liters of water per m2 per day. This value is then used to size the wastewater treatment plant.

Test pits for percolation samples
In the area where the infiltration is intended to be placed, 3 test pits are dug for taking soil samples. Note the minimum protection distance to groundwater/rock and maximum backfill. The sample is taken at the level of the future shaft bottom.

Soil bed, infiltration or raised infiltration?
If the LTAR value is less than 15, a vertical or horizontal soil bed must be constructed.

If the LTAR value is between 15 and 70, a simple infiltration can be installed if the protection distance between the diffuser pipe and the highest groundwater level is more than 1 meter. If the distance is less than 1 meter, an elevated infiltration must be installed.

If the LTAR value is above 70, reinforced infiltration must be installed. The protective distance between the spreader pipe and the highest groundwater level must also be at least 1 meter in this case.

Do not hesitate to contact us for help with dimensioning, product selection and if you wish to get in touch with an installer