Black Friday Sale at Avidity ScienceEdstrom watering systems efficiently deliver clean, controlled water to all of your laboratory animals - whether you are watering one or thousands. We offer a wide range of replacement cartridges and accessories for lab water systems. From replacement ultrapure cartridges, RO membranes, or sensors, Edstrom replacement products will return your existing lab water system to peak operating condition. See our selection of water system parts and accessories.