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We are proud to host the VGR TopChanger and  WetJect.com here at STEC Equipment. WetJect.com is your go to URL to find the VGR TopChanger where Wet or Dry Sand Injection is changing the how the aeration game is played.

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.

With the TopChanger you bring the soil in balance and keep it healthy. The TopChanger enables you to maintain the turf professionally and create a playing surface that brings joy to every sports men and sports women.

VGR TOpChanger | WetJect.com


The TopChanger 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 aerates the soil and can add sand or soil-improvement products at the same time in a single action. This thorough approach creates a healthy basis again, resulting in a strong soil with good plant growth. What’s more, maintenance with the TopChanger creates only minimal disturbance for sports players. Your outdoor sports facilities therefore remain permanently available.

You improve the soil in an innovative way with the TopChanger, taking the natural needs of the soil and the soil life into account. Whatever your specific requirements, with the TopChanger you optimize the soil life and good plant growth. It is how you provide a great playable field and give sports players the ideal sporting experience.

How does it work?

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 TopChanger aerates the soil

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.


2. T he TopChanger adds soil-improving products

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.

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.

3. The TopChanger injects sand

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.

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.


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


Maintenance with the TopChanger ensures:

  • Minimal disturbance for sports players; the field can be played on virtually continuously.
  • Long-term effect; the intensive approach means the field requires maintenance less frequently.
  • Optimum result; a dryer and thus better playable field.
  • Lower operational costs; using water for aeration limits any damage to the machine.

The result?

A well-maintained sports field geared to the wishes of the sportsperson.

VGR Groep

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.



Would you like more information about the TopChanger or would you like a demonstration? Please contact us HERE
Download the [TopChanger Brochure ]

Download our official Press release for the introduction of the TopChanger [ TopChanger Press Release ]