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Dual-tank Water Softener
HomeBrand SeriesKeman®Water SoftenerDual-tank Water Softener
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Dual-tank Water Softener – 24-hour Continuous Soft Water, Providing Comprehensive Protection

Unlike single-tank water softeners, dual-tank water softeners have two resin tanks to remove calcium and magnesium ions from the water, reducing its hardness. The two tanks work alternately; when one tank is undergoing regeneration (i.e., restoring its softening capacity), the other tank can still continuously provide soft water. This design allows it achieving a 24-hour uninterrupted supply of soft water, suitable for places that require continuous soft water, such as large residences, hotels, etc.

A white dual-tank water softener and a black dual-tank water softener
  • A white dual-tank water softener

    SS-HT1C Dual-tank Water Softener

  • A black dual-tank water softener

    SS-HK Dual-tank Water Softener

SS-HT1C Dual-tank Water Softener
  • Description
  • Structure
  • Features
  • Specifications
  • Working Principle
Description

The SS-HT1C dual-tank water softener is equipped with two resin tanks that alternate softening, ensuring a 24-hour supply of soft water. Its compact size and strong softening capability allow it to be installed under the kitchen counter, on the balcony, or in the bathroom. It is ideal for homes ranging from 100–140 m2 and areas with high water hardness.

A white smart dual-tank water softener
Structure
  1. Intelligent softening valve: Integrates filtration, cleaning, and control into one unit to improve softening efficiency.
  2. Resin tank: With a comprehensive resin layer height of 124 cm, it provides a large exchange capacity and high softening efficiency.
  3. Salt well: Equipped with a upper check salt valve, it reduces operating noise and eliminates the risk of water leakage associated with traditional salt valves.
The resin tank and cross-sectional view of the SS-HT1C dual-tank water softener
Features
  • Integrated design, compact structure, a small footprint, easy to install, and high softening efficiency.
  • Equipped with an upper check salt valve, it reduces operational noise and addresses the leakage risks associated with traditional salt valves.
  • It utilizes Rohm and Haas resin from the USA, with a comprehensive resin layer height of 124 cm, offering large exchange capacity and high softening efficiency.
  • It has a dual-channel water distributor for effective utilization of the bottom filter media, ensuring thorough resin regeneration and improving regeneration efficiency by 15%.
  • Flow-time mixed /time regeneration mode enable it to automatically activate the regeneration mode either at a preset time or upon reaching a set flow volume.
  • Dry salt tank technology is adopted. The salt tank is only filled with water to dissolve salt before regeneration, keeping it dry during other stages. This prevents prolonged soaking of the resin tank and avoids brine contamination.
Specifications
Table 1: SS-HT1C Dual-tank Water Softener Specifications
Model SS-HT1C
Control Valve Type Automatic softening valve
Regeneration Mode Meter-timer mix / timer
Softening Capacity 6000 m3
Softening Resin Capacity 16 L
Fiberglass Tank Dimensions 0914 + 0615
Recommended Flow Rate ≤ 1.8 T/H
Water Production per Regeneration Cycle 1.88 m³
Applicable Water Temperature 4–38 °C
Applicable Water Source Municipal tap water
Operating Pressure 0.1–0.4 MPa
Power Standard 220V / 110V 50 Hz
Inlet and Outlet Size 3/4" or 1"
Drain Pipe Diameter Ф18 mm
Recommended House Area 100–140 m²
Product Dimensions
(L × W × H)		 268 × 510 × 520 mm
Outer Box Dimensions
(L × W × H)		 340 × 530 × 630 mm
Installation Dimensions
(L × W × H)		 300 × 520 × 530 mm
SS-HT1C dual-tank water softener specification dimensions
Working Principle

A and B are two different resin tanks.

  1. Tank A softening: Tank A provides soft water, while tank B is in standby mode.
  2. Tank A saturated, tank B begins softening: When the resin in Tank A is saturated, the control valve switches to Tank B, and B begins softening the water.
  3. Tank A regeneration: Tank A enters the regeneration process, using brine to clean the resin and restore its softening capacity.
  4. Tank A standby: After regeneration is complete, Tank A returns to standby mode, ready to take over providing soft water when Tank B is saturated.
  5. Cycle repetition: Tanks A and B operate alternately to achieve 24-hour uninterrupted soft water supply.
A top view and a cutaway view of the dual-tank water softener.
SS-HK Dual-tank Water Softener
  • Description
  • Structure
  • Features
  • Specifications
  • Working Principle
Description

The SS-HK dual-tank water softener has two resin tanks, integrating dual-tank softening into one unit, providing a 24-hour supply of soft water. Its compact size, strong softening capability and a softened water flow rate ≤ 3.0 T/H allow it to be installed under the kitchen, on the balcony, in the bathroom, etc. It is suitable for areas with high hardness water quality.

2 black dual-tank water softeners of different sizes
Structure
  1. Intelligent softening valve: Integrates filtration, cleaning, and control into one unit to improve softening efficiency.
  2. Resin tank: With a comprehensive resin layer height of 124 cm, it provides a large exchange capacity and high softening efficiency.
  3. Dual-channel water distributor: It can effectively utilize the underlying filter media, ensuring thorough resin regeneration.
SS-HK dual-tank water softener structure diagram
Features
  • Integrated design, compact structure, a small footprint, easy to install, and high softening efficiency.
  • Equipped with an upper check salt valve, it reduces operational noise and addresses the leakage risks associated with traditional salt valves.
  • It utilizes Rohm and Haas resin from the USA, with a comprehensive resin layer height of 124 cm, offering large exchange capacity and high softening efficiency.
  • It has a dual-channel water distributor for effective utilization of the bottom filter media, ensuring thorough resin regeneration and improving regeneration efficiency by 15%.
  • Flow-time mixed /time regeneration mode enable it to automatically activate the regeneration mode either at a preset time or upon reaching a set flow volume.
  • Dry salt tank technology is adopted. The salt tank is only filled with water to dissolve salt before regeneration, keeping it dry during other stages. This prevents prolonged soaking of the resin tank and avoids brine contamination.
  • It is equipped with an intelligent salt refill reminder function to prevent low brine concentration.
  • It has a 72-hour power outage memory function, which automatically remembers the current working state during a power outage and resumes operation once power is restored.
Specifications
Table 2: SS-HK Dual-tank Water Softener Specifications
Product Model SS-HK1 SS-HK2
Control Valve Type Series softening valve Series softening valve
Regeneration Mode Meter-timer mix / timer Meter-timer mix / timer
Resin Volume 14 L 32 L
Tank Size 0913 + 0615 0926 + 0628
Softened Water Flow Rate ≤ 1.5 T/H ≤ 3.0 T/H
Operating Pressure 0.1–0.4 MPa
Power Standard 220V / 110V 50 Hz
Inlet and Outlet Size 3/4" or 1"
Drain Port Size Ф18 mm
Salt Consumption 1.68 kg 3.84 kg
Gross Weight 23 kg 42.5 kg
Product Dimensions
(L × W × H)		 270 × 575 × 490 mm 270 × 575 × 820 mm
Outer Box Dimensions
(L × W × H)		 345 × 605 × 595 mm 345 × 605 × 925 mm
Installation Dimensions
(L × W × H)		 300 × 600 × 550 mm 300 × 600 × 880 mm
Images of SS-HK dual-tank water softeners in two different sizes
Working Principle

A and B are two different resin tanks.

  1. Tank A softening: Tank A provides soft water, while tank B is in standby mode.
  2. Tank A saturated, tank B begins softening: When the resin in Tank A is saturated, the control valve switches to Tank B, and B begins softening the water.
  3. Tank A regeneration: Tank A enters the regeneration process, using brine to clean the resin and restore its softening capacity.
  4. Tank A standby: After regeneration is complete, Tank A returns to standby mode, ready to take over providing soft water when Tank B is saturated.
  5. Cycle repetition: Tanks A and B operate alternately to achieve 24-hour uninterrupted soft water supply.
A cross-sectional view of the dual-tank water softener.
Nuonuo is stretching out its fins and smiling.

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