WSP Twin-Tank Water Softener, C-Series

If your home can’t go without soft water even while your system is regenerating, the WSP Twin-Tank Water Softener, C-Series, is designed to keep soft water flowing continuously. Available in capacities of 80,000 and 110,000 grains, it tackles hard water without interruption.

The problem

Hard water leaves behind scale that builds up on fixtures and inside appliances. You notice it as the orange rings in your toilet tank, the chalky film on shower doors, towels that feel stiff even after washing, or coffee that tastes flat and metallic. If you’ve had a water softener before, you may have dealt with the hassle of no softened water during the regeneration cycle, which means hard water temporarily returns to your taps.

Why it’s happening

Hard water contains minerals like calcium and magnesium that settle out and cause scale. A water softener removes these minerals through a process called ion exchange, where hard mineral ions are swapped for softer sodium ions. But single-tank softeners need to pause water treatment during regeneration—a cleaning cycle that flushes out the minerals they’ve caught. Without softened water during that time, your household water reverts to hard water until the cycle finishes.

What it’s costing you to leave it

When hard water returns during regeneration, your water heater and appliances are exposed to minerals that speed up scale buildup, shortening their life. Cleaning becomes more frequent and tougher, as scale stains and soap scum accumulate faster. Laundry doesn’t rinse as well, causing fabrics to wear out sooner, and your detergent and soap usage goes up to compensate for the water’s hardness.

How this system fixes it

The twin-tank design means you have two softening tanks working side by side. While one tank regenerates, the other continues to soften your water. The system switches automatically between tanks, so there’s no downtime and no hard water flowing to your home. This setup uses ion exchange in each tank, ensuring continuous soft water at all times.

What this system can handle

The WSP Twin-Tank Water Softener, C-Series, comes in two sizes: one treats up to 110,000 grains of hardness before it needs regeneration, and the other handles up to 80,000 grains. Both are built to handle the demands of an entire home or building that can’t have softened water interrupted. They work well for households with high water use or very hard water, switching tanks automatically to keep water soft without breaks. This system is reliable for continuous operation and can handle the mineral levels that typically cause scale in residential or light commercial settings.

What you actually get

Included with your system is a lifetime warranty on the tank itself—the pressure vessel that holds the resin and water is covered for as long as you own it. The control valve and electronics have their own manufacturer warranties. The system also comes with a bypass valve at no extra charge, allowing you or your plumber to isolate the softener and maintain water flow during any maintenance. Ten feet of discharge hose for the drain line is also included, making installation straightforward for your licensed plumber.

Is this the right size for you?

If your household uses water continuously and can’t afford hard water during regeneration, this twin-tank softener is designed for you. Choose the 110,000 grain model if you have very hard water or a larger household, or the 80,000 grain unit for moderate hardness and average use. If your water condition or usage is lower, a single-tank softener might suffice and be more cost-effective. For very large commercial needs beyond typical residential scale, a larger or specialized system may be necessary.

Living with it

Maintenance mainly involves occasional refilling of salt if your system uses it for ion exchange, and periodic cleaning of the brine tank if applicable. The bypass valve allows easy isolation for any servicing your plumber might perform. Regeneration happens automatically, and since the tanks take turns, you won’t experience water hardness interruptions. The system’s durable components mean it’s built to operate smoothly for many years with routine care.

What it won’t do

This softener reduces hardness minerals but does not address issues like sediment, chlorine taste or odor, bacteria, iron bacteria, or chemical contaminants. If your water has those problems, you’d need additional filtration or treatment systems designed specifically for those challenges.

Why buy it from us

Water Softener Plus stands behind our house-brand equipment with real serviceability. The tanks carry a lifetime warranty, and parts for controls and electronics are available from the manufacturer as needed. We ship your system from Tampa, Florida, with free U.S. delivery included. Our team provides expert sizing help every time, ensuring you get the right setup for your water. Plus, we offer a 90-day money-back guarantee for peace of mind.

Included with this system

• Lifetime warranty on the tank. The control valve and electronics carry the manufacturer's own warranty.
• Bypass valve included, so the system can be isolated for service while water keeps running to the house.
• 10 feet of discharge hose for the drain line.

Specifications

What this system handles

• Scale on fixtures and glassware
• Soap that won't lather
• Stiff laundry and towels
• Scale inside the water heater

The next step

Contact the WSP team to request your free quote and sizing consultation. We’ll ask about your water problem and ZIP code to confirm the best configuration and send your pricing details. Get in touch to keep your water soft without interruption.