HILTI DD-WMS 100 WATER MANAGEMENT SYSTEM. To use with the Hilti DD-WCS water collector fitting when diamond core drilling. Basically this unit pumps water to the water collector and then sucks in back and filters it and keeps pumping it around. See Hilti website for more info or lots of demo videos online if your not familiar with this unit. Machine has been fully checked over in my workshop and is in very nice condition. Comes with a water hose and a vacuum hose and has 1 filter bag fitted. More filter bags can be bought from Hilti website. You get what you see only. Vat Included, Proper Vat Invoice Supplied with goods. I will then be in touch with you to arrange, or see last pic for contact number!