3M WTS 57 is designed for a small family of up to 6-8 persons. Built-in automatic high-performance intelligent valve for operational ease. High capacity salt storage to minimise the frequency of salt refilling. As per NSF and WQA standards Includes sliding cover convenient for operation & maintenance High-performance intelligent control valve. NSF identification with structural strength, dual mode with time and flow and free maintenance Resin tank. NSF identification with structural strength and bigger volume for resin storage Ease of installation Brand 3M Aqua-Pure Model No. IAWTS 57 Flow Rate (Ltrs/hr) 3360 Ltrs/hr Resin Brand 3M Resin Type Food Grade Operation Type Automatic Flow Rate 56 L/Min Regenerant Common Salt (NaCl) Salt Required / Regeneration Depends on Hardness Regeneration Time 45 minutes (average) Inlet/Outlet pipe size (mm) 25x25