... -Stage Water Softener 3stage ,sand, carbon and resin, with fleck control valve with brine tank and pump water softenerion exchange resin water ... -T Multi-stage Water Softener uses multi-way Control Valve and Controller, it has two control methods: time controlling and flow controlling, usually ... H.equip with 3stage ,sand, carbon and resin, with fleck control valvewith brine tank and pump water softener