PWP Little Beast Dual RO/DI - 115V *Pure Water Power Little Beast Dual RO DI 115V Overview The Pure Water Power Little Beast Dual RO DI 115V is a powerful water purification solution that can produce up to 1 gallons per minute off of source pressure. When used with the included booster pump, it is capable of producing up to 2. 5 gallons per minute! Its ability to seamlessly adapt to different settings and its efficient performance make the Little Beast a reliable workhorse for users