Working water pressure ranges from 80 to 130 psi and 0.7 GPM output speed. Built-in water inlet and outlet gauges for easy pressure monitoring. Optional booster pump is recommended for water pressure 80 psi and below. 4-Stage Water Filtration: 1x 20? PP Sediment Filter with clear filter housing offers easy water quality and filter replacement monitoring, 2x 20?Carbon Block Filters, and an RO Membrane rated at 1,000 GPD in a stainless steel membrane housing. Removes up to 99% of over 1, 000 contaminants, including lead, chlorine, fluoride, arsenic, asbestos, calcium, sodium, and more. This core of iSpring commercial RO filtration systems beats contaminants and provides you with clean water up to 1,000 gallons per day.