Cartridge filters are installed where water free of suspended substances such as sand, limestone flakes and iron oxide is required. Once detached from the pipes, these substances damage or obstruct taps, shower heads and wall boilers. SIRIO stainless steel filters solve problems related to water temperature, pressure fluctuations and algal blooms. The AISI 304 stainless steel cup is made for drawing in a single piece without welding; this makes the filter reliable and resistant to the stresses to which a pressure appliance is normally subjected. The mirror finish completes the valuable aesthetic effect of the product. They are available in versions of 7’‘ (compact and easily placed in tight spaces), 10’‘ (mostly used in domestic applications, but also on industrial plants), and 20’‘ (with the possibility of inserting two overlapping 10’‘ cartridges) The cartridges that can be used are washable, in polypropylene, activated carbon, stainless steel. The cartridge can be easily washed or replaced by opening the original semi-fold closure, which guarantees a perfect seal and makes using the clamping keys obsolete.