When it comes to pumping a typical concrete mixture, let™s face it”most pumps out there will work. When it comes to pumping a shotcrete mixture, however, your choice of pumps is critical.Shotcreting can be the most demanding job for a concrete pump. Basically, you are asking your pump to push a low-slump mixture, usually through a 2 in. (50 mm) diameter hose, as fast and as far as possible. Before you go and buy the largest, toughest pump you can find, you should ask your-self some questions.