TWA offers a water softener system in the tank "cabinet" singular style and the style of the two-tank. To compare water softeners style, considering the amount of space that you want the system to take, plus the capacity required water hardness in your location.
A single tank system requires less space, since nests in the tank softener salt tank
How Single Tank Water Softeners Work
A “Single Tank Water Softener”, is a system with 1 resin tank and 1 brine tank. The resin or mineral tank contains resin beads that remove the hard water minerals. The brine tank stores the salt.
“On-demand” single tank softeners count how many gallons you use. Once you reach capacity, they regenerate in the middle of the night. During regeneration, the system goes into bypass. No soft water is available during this time.
If you hit the limit in the middle of the day, you’d run out of soft water.
To avoid running out of soft water, most systems are sized with 30% additional capacity. You still run the risk of running out of soft water during very heavy water use, but your odds are improved.
Another negative with single tank systems is that they use hard water to clean themselves out during regeneration. High levels of hardness and iron can make this less effective. Imagine washing dishes in dirty water – you get the point.
How Dual Tank Water Softeners Work
“Twin Tank Water Softeners” have “2” resin tanks and 1 brine or salt tank.
Dual tank systems also regenerate on-demand. But they have an immediate advantage.
When you hit capacity on 1 tank, the system immediately switches over to the 2nd tank.
No reserve capacity is required. No delayed regeneration in the middle of the night.
You maintain even, soft water under all circumstances.
Twin Tank Water Softeners also have the luxury of using soft water for all cycles during regeneration. Again, think of washing dishes in soft, clean water. Soft water regeneration is much more effective.