ENJOY PURE CLEAN AND SAFE WATER EVERYDAY with our Two Stage water filtration system. Easy to install, no need for electricity, helps to neutralize acid and save on purchased of filter water. Stage One improves particle removal with sediment filter. This can be change in 5-6 months depending on how clean the incoming water. Second stage to turn water alkaline in pH 7.2 to 7.5. The transparent housing body is made of polypropylene for strength and resistance to chemicals and blue cap and ring are made of high flow polypropylene for toughness.