Adopted from the Twin Undersink water filter comes this simple 3-Stage Reverse Osmosis system, which ideally mounts to your laundry wall and easily connects to your mains plumbing. For the discerning customer looking for a thorough yet practical means of water filtration. The system effectively removes salts, micro-organisms and high molecular weight organic impurities, heavy metals, chemicals and pesticides. watermarkwaterqualitynsf