Cantel Medical (NYSE:CMN) said its Mar Cor subsidiary bought Siemens‘ (NYSE:SI) hemodialysis water purification unit for an undisclosed amount, part of its campaign to acquire water purification and infection control businesses across North America.

The Little Falls, N.J.-based medical device company has been snapping up such businesses lately, including ConFirm Monitoring Systems’ sterilization unit (2011), and a total buyout of Byrne Medical (2011) and GEM Water Systems (2009).

"The acquisition of the Siemens hemodialysis water customer base enables Mar Cor to realize increased efficiencies from our existing field service operations while also expanding our footprint into new geographies," Mar Cor Purification CEO Curtis Weitnauer said in prepared remarks. "With this geographic expansion, Mar Cor will further improve its ability to service its large national customers."