8-STAGE FILTRATION - Stokk 8-stage 0.0001μm RO filtration system effectively removes 1000+ contaminants by 99.99%, including TDS, PFAS, PFOA, PFOS, fluorides, chlorides and moreTESTED AND CERTIFIED BY SGS - Against from NSF/ANSI 58& 42American National Standard & EPA 200 standard, tested and certified by SGS to effectively eliminate the hidden risks of tap water. Also FCC Certified. Scan the QR for SGS online test reportTankless Design: Unlike traditional RO water filtration systems, the Stokk tankless reverse osmosis system boasts a sleek, space-saving design. It saves over 75% of under-sink space and prevents recontamination, making it perfect for American kitchens. Installing the Stokk RO system is a breeze and can be done in just 30 minutes. Save time and upgrade your kitchen nowTASTE IMPROVING - S1 reverse osmosis system adapts a composite filter technology, combining pre-activated carbon filter and post carbon filter to effectively reduce odor and chloride. The unique Coconut-shell activated carbon post filter further absorbs odors and residual chlorine, makes it more purer, fresher600 GPD & 2:1 PURE TO DRAIN RATIO: Stokk S1 Pro reverse osmosis system offers a higher water capacity of up to 600 GPD, and filtering pure water instantly without waiting, which meets demands of family for top-quality water. This tankless RO system has a low drain ratio of 2:1 and saves 800% more water compared to ordinary undersink ro systems. Stokk's RO water filtration is the optimal choice for those seeking high-performance water filtrationTHOUGHTFUL & CONVENIENT DESIGN: S1 Pro tankless RO water filtration system is equipped with a built-in filter life reminder, freeing you from tracking the filter's service life. The filter element adopts a twist-and-pull design and can be replaced within 2 seconds. Moreover, Auto flush prevents sediment accumulation, extending the filter's lifespan and ensuring your water stays consistently pureINTEGRATED PRODUCT DESIGN: The Stokk reverse osmosis system features the advanced electrical and water circuits to reduce leaks. Unique noise reduction technology allows you to enjoy pure water without the disturbance of noise. NOTE: An electrical outlet and drilling holes is required to operate itUSA-BASED SOLUTION & SUPPORT - Choose Stokk's world-class water filtration solutions and US-based customer support for excellent purchasing experience and after-sales support. lf you're not satisfied with your purchase, do not hesitate to contact our after-sales team and water specialists for technical support. (Scroll down for replacement filter purchase options below)