The Aqua Magic Pro 1" Twin Digital Metered System ensures a continuous supply of soft water with a service flow rate of 28 GPM and the ability to switch between dual tanks. When one tank is depleted, the other seamlessly takes over, maintaining a round- the-clock soft water system. The system features pre or post-treated water regenerant refill, a dependable DC Drive, and the capacity to perform backwash and brining tasks for tanks with diameters of up to 21". Assembled using NSF-certified components.