After installing the probes, grout should be used as a filler material. The best results are achieved with geothermal grout with a high lambda value. To pump the mixture into the borehole, you need a grout pump. At Agiva Int’l, we have a large range of grout injection machines. We offer the Mac-Edil grout pump, the Agiva Groutmasters, the Agiva grout plant, and the Agiva Groutboy.