Seagull IV X-1F Certified to meet EPA Standard for Microbiological Purifiers against Bacteria, Cysts and Viruses. Employs the proven "Structured Matrix" technology" Safe enough to give to a baby. No bacteria growth in the cartridge and made from marine grade stainless steel with lead-free faucets and ports. Seagull®IV ensures you can drink any water source without using chemicals, electricity or wastewater. *not a desalination unit. Nature Pure Certified to meet EPA Standard for Microbiological Purifiers against Bacteria, Cysts and Viruses. Employs the proven "Structured Matrix" technology". No bacteria growth in the cartridge. Adds a whole new angle to drinking water for RV and boat owners. Most fill water tanks at a marina or fuelling berth using mains water which has undergone a primary treatment usually chlorine. It may not be safe to drink if stored for a long period of time. Enjoy your holiday experience by using a purifier such as Nature Pure®. *not a desalination unit. “RV” Trav-L-Pure Developed for pop-up campers with direct hook-ups to camp water site water sources. Certified to meet EPA Standard for Microbiological Purifiers against Bacteria, Cysts and Viruses. Employs the proven “Structured Matrix” technology”. No bacteria growth in the cartridge. Drink any fresh water source anywhere in Australia. The “RV” is mounted externally in line, with an ordinary garden hose thread, directly to your pressurised water connection outside your vehicle. The purifier can then be removed and stored safely inside your pop-up camper in the same quick and easy way. Installs in seconds no tool required. *not a desalination unit.