Fleck 9100 SXT Twin Tank Metered On-Demand Water Softener 24/7 Soft Water Ships Loaded Complete Twin tank water softener provides continuous soft water. Space saver 10 x 40 inch structural almond mineral tanks - total height 48 inches With a twin-tank system featuring the new Fleck 9100 valve, customers benefit from soft water 24/7. Resin Ships Loaded For Easier Installation - USA Structural almond Mineral Tanks Free bypass comes with male threaded yoke for easy installation - installation video link sent via Amazon messaging upon shipment.