Aquatec ® AFT Auto Flush Kit With Timer. Reduces "brine to product" ratio. Improves system "TDS" rejection rate. Extends membrane life. Hermetically protected electronics for long life. One of the challenges addressed by Aquatec's Engineering staff was the development of a device that would assist the R.O. membrane to perform with maximum efficiency for longer time periods. Most designers recommend that a R.O. system be flushed on a regular basis. Aquatec's AFR 600 series Auto-Flush valve provides this flush. In addition, the AFT can reduce the "brine to product" ratio, especially in low "TDS" applications, while maintaining or improving system "TDS" rejection rate and extending membrane, sediment and carbon filter life. Upon system start-up and every hour thereafter, the 24 VAC normally closed solenoid valve automatically "power-flushes" the membrane at full pump flow, or full line pressure in unboosted systems, for 18 seconds every hour. Turbulent water action scrubs organic and inorganic contaminants from the membrane surface, extending membrane life and efficiency. The "power flush" occurs only while the system is in the water making mode. The flush cycle is reset automatically when the R.O. system repeats the "water making" mode after the "full tank shut-down" mode. Water which has been standing idle in the membrane module for an extended period, is purged to the drain.