The VGR TopChanger, aldo known as the WetJect is an innovative machine that restores the balance to the composition of the soil. It takes care of the proper ratio between organic substances, nutrients, air and water. Disruptive layers in the soil are tackled specifically.

The TopChanger assures you of a well-maintained sports field geared to the players. They experience very little disturbance while the work is being performed.


The TopChanger performs all the actions required to condition the soil in a single pass. Depending on the needs of the soil, you can perform the following actions:
1) The WetJect aerates the soil.
2) The WetJect can add soil-improving products.
3) The WetJect injects Wet or Dry Sand.



Good outdoor sports facilities start with a playing field that fulfills the sport and game requirements of the players. After all, the playing field is an important basis in sport. You want to give your users optimum playing conditions so they can always perform at their best. A well-balanced soil lays the basis for this. Healthy soil improves plant growth which is essential for healthy and strong turf.

VGR Groep is an innovative service provider in the construction and maintenance of green spaces for outside sports facilities and nature conservation areas. Our guiding principle is always ‘topsoil is the basis’. VGR Groep improves soil using an innovative method. We take the natural needs of the soil and soil life into consideration. Our soil-based method assures optimum condition for your turf.
  • <b>It Aerates the Soil</b><p></p>The TopChanger uses water power to aerate the soil. When water is injected under high pressure, it makes paths into the soil. This creates aeration holes. These air pores bring oxygen into the soil. The soil then absorbs the water, allowing the TopChanger to aerate without leaving any residue on the sports field.
This unique aeration method ensures lower operational costs. Using water for aeration, especially in soils containing obstacles, minimizes any machine breakdowns.
  • <b>It adds soil-improving products </b><p></p>Does the soil analysis show a need for nutrients? When soil-improving products are added to the water, the soil is provided with nutrients and aerated simultaneously.<p></p>

The soil-improving products are added in the necessary concentrations to the water. The liquid substances are introduced into the soil exactly where they are needed, feeding the roots directly.
  • <b>It INjects Wet or Dry Sand</b><p></p>If necessary, the aeration holes can be filled immediately with wet or dry sand. The TopChanger injects the sand deep into the soil, which keeps any residue left on the sports field to a minimum.<p></p>

The sand helps the water infiltrate better in the lower layer of the soil. The top layer of the field thus remains dryer and better playable. Apart from sand, you can also inject soil improving products into the soil with the TopChanger.