A. O. Smith Corporation
TDS CREEP SOLUTION FOR PUMPLESS, TANKLESS SYSTEM

Abstract:

A water purification system includes a water inlet for delivering feed water, a membrane having an upstream side and a downstream side, and a water outlet for drawing permeate out of the system. The system includes a plurality of valves operable to control a flow path of feed water, the permeate, and impure water through the system, and a drain in connection with the upstream side and configured to receive the impure water and impurities from the feed water. The system includes a tank configured to receive permeate from the downstream side of the membrane and to store a standby volume of the permeate for delivery to the outlet during an initial portion of a water draw, and a control system for manipulating the plurality of valves.