The ASDC-6060-4/2/PVC is one of our largest water softeners. The ASDC-6060- 4/2/PVC features 2 inch regeneration and 4 inch outlet Schedule 80 PVC face piping, a twin alternating stager and controller which can be controlled with air or water pressure, a flow sensor, and optional flow transmitter capability. This softener also features Carbon Steel Epoxy lined ASME code tanks, PVC Diaphragm valves, and Viton/EPPM seal construction.