After the drains gets into such an installation, the pressure relay is triggered, and the pump is launched, after which, the drains are crushed and removed using a pressure pipe. As soon as the water flow in the installation stops, the relay is relayed and the pump is automatically turned off, and the pressure valves do not allow the liquid to return back. In order to purchase such an installation, go to the online store — SAD. , There you can also find pumping equipment that provides high -quality water supply.