The AQUATEC Auto-Flush Flow Restrictor Timers are used to maximize system efficiency and prolong the life of an RO membrane. The Auto-Flush Flow Restrictors feature a normally closed design which automatically flushes the membrane at start-up and 12-20 seconds every hour after. Features: Connection Size: 1/4" QC Electrical Connection: AMP Mate-N-Lok Inlet Pressure/Orifice: Maximum 100 psi, .093” diameter orifice Power Requirements: 24 VAC/24 VDC, 120 mA - flushing, 40mA – off cycle Wetted Materials: Polypropylene, EPDM, Stainless Steel