48 000 grain capacity microprocessor based metered water softener. The WS4C softener comes with a 5600 Econominder control and valve (3/4" connections standard) with an integral mechanical metered control. This model incorporates a mechanical water metering system that even works in the event of a power failure! The metered system gives you a high efficiency regeneration to minimize salt consumption. A beige colored resin tank manufactured by Structural is poly lined and fiberglass reinforced. The standard softener is a "two tank" configuration with a separate poly brine tank in almond. A system by-pass valve is included along with the purchase of any unit.