Solid-state microprocessor with LCD display that shows time of day remaining capacity flow rate regeneration cycle in process and more. Fully-adjustable down flow or upflow regeneration cycles. Choose from three modes of operation: immediate meter regeneration delayed meter regeneration or delayed time regeneration. NiCad battery available for backup. Backwash flow control button sold separately. 6600 Spec Sheet 6600 Down Flow Valve Parts List 6600 Up flow Valve Parts List 6600 Down Flow Valve Service Manual 6600 Up Flow Valve Service Manual SE Controller Spec Sheet and Information Fleck Residential Valve Overview Fleck Commercial Valve Overview

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