US15L is built with BPA-free polypropylene housing, heavy-duty metal bracket, and long-lasting replaceable filter cartridge. The system is sturdy, durable, and low maintenance. Average 8-12 month filter service life. Replace only the filter cartridge, NOT the Entire Housing, further saves filter replacement cost and produces less waste to better protect the environment. No need to hire a professional to install. The water filtration system under sink package contains everything for common under sink water filter installation, including two stainless steel braided hoses. Connect the water filter system directly to a kitchen or a bathroom sink. A 1/2" to 3/8" adapter included fits most faucets and water valves.US15L water filter under sink treats water effectively without sacrificing its performance. The water filter for sink is tested at 60 psi with 1 GPM flow rate with minimal pressure drop. high-capacity composite can filter your tap water down to 3 micron. Reduces up to 99% of chlorine, smell, bad taste, heavy metals, sediment and other particles while keeping essential minerals such as calcium, magnesium, potassium, etc. in your filtered water. Please note the system does NOT reduce TDS ppm.