Water purity is becoming a key issue for many responsible homeowners, with concerns about the quality of tap-water leading increasing numbers of people to items that ensure the removal of impurities.With this in mind, kitchen product manufacturer In-Sink-Erator has recently released a water filter system as an extra to go with its Steaming Hot Water Tap, looking to provide water that is both boiling hot and pure.The special tap system provides buyers with instant boiling water in their kitchens, allowing busy kitchen-goers to bypass the kettle and fix a rapid cup of tea, but the complementary water filter promises to further increase its appeal.In-Sink-Erator claims that its extra product will significantly reduce chlorine and soluble impurities which can make tap water a less healthy option, while also removing scale and solid particles from the steaming tap.The company claims that its F-701R Filter boasts additional lead protection, while the F-801R Filter offers a cyst filter in addition to the chlorine and odour-busting capacities of the F-701R. Water impurities can vary dramatically depending on the season, with the dead leaves and decaying plants of the late autumn and winter risking low-level organic contamination in surface waters, which then peaks in January and February but falls much lower in summer.