Three-tank Water Softener – Optimized Regeneration Process, Continuous Soft Water Supply

The three-tank water softener is an all-in-one water softener composed of three resin tanks, intelligent control valves, brine tank, etc. The three resin tanks work alternately to provide a continuous 24-hour soft water supply. The intelligent control system can automatically regenerate on demand, reducing brine waste and improving equipment efficiency. Compared to the dual-tank water softener , it further enhances the continuity and stability of water supply.

This equipment is aesthetically designed, featuring a compact structure, easy to operate, a large soft water flow. It is suitable for large households, areas with high water hardness, high-end residences, and other places with high water flow demand. It can be installed near the kitchen, bathroom, or other water-using equipment in the home.

Structure

The home RO water purifier includes multi-stage filtration system, generally consisting of 5–8 stages of filtration.

Housing: Compact structure and small size.
Intelligent softening valve: Integrates filtration, cleaning, and control into one unit to enhance softening efficiency.
Touch panel: High-definition display for convenient and quick operation.
Resin tank: With a comprehensive resin layer height of 124 cm, it offers large exchange capacity and high softening efficiency.

A structural cutaway view of a three-tank water softener

Features

Three resin tanks provide continuous soft water supply 24 hours a day, suitable for high water flow demands.
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 is equipped with an intelligent salt refill reminder function to prevent low brine concentration.
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 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.

Working Principle

The three-tank water softener operates by alternating three resin tanks and automatically controlling the regeneration process based on water consumption and time.

Softening process: Raw water first enters a resin tank, where sodium ions in the resin replace hardness ions such as calcium and magnesium in the water, thus producing softened water.
Alternate regeneration: When one resin tank reaches saturation, the control valve automatically switches to another tank to continue providing softened water, while the saturated tank enters regeneration mode. During the regeneration process, brine from the salt tank is drawn into the saturated resin tank to remove calcium and magnesium ions from the resin. After regeneration, the tank enters standby mode, ready to resume softening when the other tanks become saturated.
Intelligent control: The system automatically adjusts regeneration frequency based on water consumption, achieving on-demand regeneration to maximize the efficiency of both brine and water usage.

Three-tank water softener water treatment process structure diagram

Specifications

Table 1: Three-Tank Water Softener Specifications
Product Model	SSS-T1
Control Valve Type	ASB2-C
Regeneration Mode	Meter-timer mix / timer
Resin Volume	24 L
Tank Size	1015 + 0617 + 0617
Softened Water Flow Rate	≤ 2.0 T/H
Working Pressure	0.1–0.4 MPa
Power Standard	220V / 110V 50 Hz
Inlet and Outlet Size	3/4" or 1"
Drain Size	Ф18 mm
Salt Consumption	2.6–2.8 kg
Gross Weight	37.5 kg
Product Dimensions (L × W × H)	428 × 485 × 520 mm
Outer Box Dimensions (L × W × H)	465 × 540 × 615 mm
Installation Dimensions (L × W × H)	480 × 500 × 530 mm

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