Clack Corporation Water Softener Manual: A Comprehensive Guide
This manual details Clack water softeners, including the WS1 series and Pro Series WS100, offering guidance on installation, operation, and troubleshooting for optimal performance.
Clack Corporation has been a leading force in water treatment solutions since 1944, dedicated to precision water purification technology. Their water softeners, like the WS1 metered series and the advanced Pro Series WS100 On Demand, are engineered for both residential and commercial applications.
These systems address hard water issues effectively, utilizing innovative designs and reliable components. Clack softeners are known for their simplicity and advanced capabilities, often featuring dual tank configurations with the WS1EE Twin Alternating Control Valve for continuous soft water.
Pre-assembled and complete with essential components – brine tanks (18×30 or 14x14x34), bypass valves, and lead-free plumbing connectors – Clack softeners offer a comprehensive solution. This manual provides a detailed guide to understanding, installing, operating, and maintaining your Clack water softener, ensuring years of efficient and reliable performance.
Understanding Clack WS1 Metered Water Softener Series
The Clack WS1 Metered Water Softener Series represents a significant advancement in water treatment, available in six different sizes to suit varying household needs. These systems utilize a metered regeneration process, meaning they regenerate based on actual water usage, maximizing efficiency and minimizing salt consumption.
This series is designed for applications requiring continuous soft water, and often incorporates the WS1EE Twin Alternating Control Valve, providing uninterrupted service even during regeneration. The WS1’s metering system accurately tracks water consumption, initiating the regeneration cycle only when necessary.
Each unit comes pre-assembled with a brine tank (either 18×30 or 14x14x34) and includes a bypass valve and 3/4″ or 1″ brass lead-free plumbing connectors for easy installation. Understanding the metered regeneration cycle is key to optimizing performance and longevity.
Clack Pro Series WS100 On Demand Water Softener: Overview
The Clack Pro Series WS100 On Demand Water Softener is a complete water treatment system engineered for simplicity and advanced capabilities. While not available for direct online purchase – requiring a call to 847-462-9000 for pricing – this system delivers exceptional performance. It’s designed with an on-demand regeneration feature, responding to water usage patterns for peak efficiency.
Established in 1944, Clack Corporation’s legacy of quality is evident in the WS100’s construction and functionality. This softener utilizes precision water purification technology, providing reliable and consistent water softening. The on-demand system learns household water consumption, optimizing regeneration cycles and minimizing wasted water and salt.
The WS100 is a testament to Clack’s commitment to innovation, offering a robust and user-friendly solution for residential water treatment needs.

Components and Features
Clack softeners feature a WS1EE Twin Alternating Control Valve, alongside durable brine tanks (18×30 or 14x14x34) and lead-free brass plumbing connectors.
Control Valve: WS1EE Twin Alternating Control Valve
The WS1EE Twin Alternating Control Valve is the heart of Clack’s advanced water softening systems, providing reliable and efficient operation. This innovative design utilizes two resin tanks, allowing for continuous soft water delivery even during regeneration. Unlike single-tank systems, the WS1EE ensures uninterrupted service, eliminating the downtime associated with traditional regeneration cycles.
Featuring a user-friendly interface, the WS1EE allows for precise programming of regeneration schedules and hardness settings. Its metered regeneration capability optimizes salt and water usage based on actual water consumption, promoting environmental responsibility and cost savings. The valve’s robust construction and high-quality components guarantee long-lasting performance and minimal maintenance. It’s a key component in both metered and on-demand softening solutions offered by Clack Corporation.
Brine Tank Specifications (18 x 30 & 14 x 14 x 34)
Clack water softeners are supplied with either an 18 x 30 inch or a 14 x 14 x 34 inch brine tank, depending on the model and application requirements. The brine tank is a crucial component, responsible for creating the salt solution used during the regeneration process. Proper brine tank sizing is essential for optimal softener performance and efficiency.
The larger 18 x 30 tank offers greater salt storage capacity, reducing the frequency of refills, ideal for households with higher water usage or hardness levels. The 14 x 14 x 34 inch tank is a more compact option, suitable for installations with limited space. Both tanks are constructed from durable, corrosion-resistant materials, ensuring long-term reliability. Maintaining an appropriate water level within the brine tank is vital for successful regeneration cycles.
Plumbing Connectors: 3/4″ or 1″ Brass Lead-Free
Clack water softeners utilize high-quality, lead-free brass plumbing connectors, available in either 3/4″ or 1″ sizes to accommodate various household plumbing systems. These connectors ensure a secure and reliable connection between the softener and your water supply lines. The use of lead-free brass is paramount, safeguarding your water quality and adhering to stringent safety standards.
Selecting the correct connector size is crucial for optimal flow rate and preventing leaks. Most residential applications utilize the 3/4″ connectors, while larger homes or those with higher water demands may require the 1″ option. Proper installation, including the use of Teflon tape, is essential to create a watertight seal. These durable brass connectors contribute to the longevity and dependable operation of your Clack water softening system.

Installation Guide
Proper installation is key for optimal softener performance. This section provides a step-by-step guide, covering pre-installation checks, bypass valve setup, and plumbing connections.
Pre-Installation Checklist
Before beginning the installation process, ensure you have a comprehensive understanding of the system and all necessary components. Verify the availability of a suitable water supply line, capable of handling the softener’s flow rate, and confirm adequate space for both the softener unit and brine tank.
Inspect all included parts against the parts list to confirm nothing is missing. Gather essential tools, including pipe wrenches, Teflon tape, and potentially a tubing cutter, depending on your plumbing configuration.
Crucially, assess the water hardness level to properly program the softener for efficient regeneration. A water test kit is highly recommended. Finally, familiarize yourself with local plumbing codes and regulations to ensure compliance throughout the installation process, avoiding potential issues later on.
Bypass Valve Installation
The bypass valve is a critical component, allowing continued water access during maintenance or softener repair. Begin by carefully shutting off the main water supply to the house. Position the bypass valve assembly onto the inlet and outlet plumbing lines, ensuring correct flow direction as indicated on the valve body.
Apply Teflon tape to all threaded connections to prevent leaks. Tighten the connections securely with pipe wrenches, avoiding over-tightening which could damage the valve or plumbing.
Once installed, test the bypass valve by slowly turning the main water supply back on and verifying water flows through the bypass position. This confirms proper functionality before connecting the softener itself, providing a safeguard during the rest of the installation;
Connecting Plumbing: Inlet & Outlet
With the bypass valve installed and tested, proceed to connect the softener’s inlet and outlet ports. Ensure the water supply remains off during this process. Using the provided 3/4″ or 1″ brass lead-free plumbing connectors, carefully align the softener ports with your existing plumbing lines.
Apply Teflon tape to all threaded connections before tightening. Hand-tighten the connectors initially, then use pipe wrenches for a secure, leak-proof seal, again avoiding excessive force.
Double-check all connections for tightness and proper alignment. Slowly restore the water supply, carefully inspecting for any leaks around the inlet and outlet connections. Address any leaks immediately by tightening the connections further or reapplying Teflon tape as needed.

Operation and Maintenance
Regular maintenance ensures optimal softener function. This includes understanding regeneration cycles – metered and on-demand – and consistently replenishing salt levels for effective water treatment.
Metered Regeneration Explained
Metered regeneration, a core function of Clack water softeners, operates based on actual water usage. The WS1 control valve meticulously tracks the volume of water passing through the system, initiating the regeneration cycle only when a pre-set amount of water has been used.
This intelligent system avoids unnecessary regeneration, conserving both salt and water – a significant advantage over timer-based systems. During regeneration, the softener backwashes to remove accumulated sediment, then draws brine from the brine tank to recharge the resin beads with sodium ions.
These beads, responsible for softening, exchange sodium for hardness minerals like calcium and magnesium. The final rinse cycle flushes away the waste brine, preparing the softener for continued operation. Monitoring water usage and adjusting the metered settings ensures efficient and cost-effective water softening.
On-Demand Regeneration Explained
On-demand regeneration, featured in Clack’s Pro Series WS100, represents an advanced approach to water softening. Unlike metered systems relying solely on volume, on-demand regeneration monitors both water usage and hardness levels. This system utilizes sophisticated sensors to detect mineral breakthrough, triggering regeneration precisely when needed, regardless of water consumption.
This proactive approach maximizes efficiency, minimizing salt and water waste. The WS100’s control valve initiates the regeneration cycle through backwashing, brine draw, and a final rinse, similar to metered systems. However, the decision to regenerate is driven by actual water quality, ensuring consistently soft water.
Properly setting the regeneration parameters and understanding the system’s response to hardness fluctuations are crucial for optimal performance and long-term cost savings.
Salt Refill Procedures
Maintaining adequate salt levels within the brine tank is essential for your Clack water softener’s effective operation. Regularly check the salt level, ideally monthly, and replenish when it falls below half the tank’s capacity. Use only high-quality water softening salt – rock salt, solar salt, or evaporated salt – avoiding salts with red or orange coloring or anti-caking agents that can damage the system.
When refilling, gently pour the salt into the tank, avoiding direct impact on the grid plate to prevent damage. Do not overfill; leave space for brine formation. Dissolved salt forms the brine solution used during regeneration to cleanse the resin beads.
Periodically, a small amount of salt bridging or crusting may occur. Break up any bridges with a broom handle to ensure proper brine draw.

Troubleshooting Common Issues
Addressing problems like clacking noises, low water pressure, or regeneration cycle failures ensures your Clack softener operates efficiently and delivers consistently soft water.
Addressing Unusual Clacking Noises
Unusual clacking sounds within your Clack water softener often indicate a mechanical issue requiring attention. These noises typically originate from the control valve, specifically the WS1EE Twin Alternating Control Valve, or potentially from the resin tank itself. Initially, verify the water pressure is within the recommended range; fluctuations can exacerbate existing sounds.
If the clacking persists, inspect the control valve for loose components or debris accumulation. A thorough examination of the valve’s internal parts may reveal a worn or damaged piston, seal, or injector. Remember that if things “clack,” they make a short, loud noise when hitting each other. Occasionally, mineral buildup can contribute to these sounds, necessitating a valve cleaning.
Furthermore, ensure the brine tank is properly filled with salt and free from bridging or clumping. In some instances, the clacking may simply be the sound of the valve cycling during regeneration, but consistently loud or unusual noises warrant further investigation to prevent potential damage.
Low Water Pressure Troubleshooting
Experiencing reduced water pressure with your Clack water softener can stem from several causes. First, confirm the bypass valve is fully open, ensuring water isn’t being diverted around the softener. Inspect the inlet and outlet plumbing connectors – typically ¾” or 1” brass lead-free fittings – for any obstructions or kinks restricting water flow.
A clogged resin tank is a common culprit; schedule a regeneration cycle to flush out accumulated sediment and mineral deposits. If pressure remains low after regeneration, examine the control valve (WS1EE) for debris lodged within the injector or valve body.
Additionally, verify your home’s main water pressure is adequate. Low incoming pressure will naturally translate to reduced pressure downstream. Consider cleaning or replacing the sediment filter upstream of the softener. If issues persist, consult a qualified plumber to rule out problems within your home’s plumbing system.
Regeneration Cycle Problems
If your Clack water softener’s regeneration cycle isn’t functioning correctly, several factors could be at play. First, ensure an adequate salt supply is present in the brine tank (18×30 or 14x14x34). Insufficient salt prevents effective brine creation, hindering the cleaning process.
Check the control valve (WS1EE) for error codes, which provide diagnostic clues. A malfunctioning injector can disrupt brine draw and rinse cycles. Verify the drain line isn’t kinked or clogged, allowing proper wastewater discharge.
For on-demand regeneration, confirm the hardness settings are accurately programmed. Incorrect settings may lead to infrequent or ineffective cycles. If the meter isn’t registering water usage, it won’t trigger regeneration. Inspect the meter for obstructions. If problems continue, a manual regeneration may be necessary, followed by professional inspection.

Advanced Settings & Programming
Customize your Clack softener by adjusting regeneration frequency, setting precise hardness levels, and interpreting error codes for optimal water treatment and system efficiency.

Adjusting Regeneration Frequency
Regeneration frequency is crucial for efficient operation and salt consumption. The Clack WS1 control valve allows for customized settings based on water usage and hardness. Initially, the factory setting often defaults to regeneration every three days; however, this may not be optimal for all households.
To adjust, access the programming mode on the control valve. Navigate to the regeneration frequency setting, typically represented by a number or a symbol indicating days. Increasing the frequency ensures consistently soft water, but elevates salt usage. Conversely, decreasing the frequency conserves salt, but risks reduced softening capacity.
Monitoring water hardness and usage patterns is key. If you notice hard water symptoms returning before the next scheduled regeneration, increase the frequency. If salt usage seems excessive, consider decreasing it. The goal is to find a balance between water quality and resource conservation, tailored to your specific needs and water conditions.
Setting Hardness Levels
Accurate hardness level setting is paramount for effective water softening. The Clack WS1 control valve requires input of your water’s hardness, measured in grains per gallon (GPG) or parts per million (PPM). Obtain a professional water test to determine your specific hardness level; relying on estimates can lead to suboptimal performance.
Access the programming mode on the control valve and navigate to the hardness setting. Input the GPG value obtained from your water test. The valve uses this information to calculate the appropriate regeneration cycle duration and brine draw. Incorrect settings can result in insufficient softening or wasted salt.
If your water hardness fluctuates seasonally, adjust the setting accordingly. Regularly re-testing your water ensures continued optimal performance. Remember, higher hardness levels necessitate more frequent regeneration and increased salt consumption to maintain consistently soft water throughout your home.
Understanding Error Codes
The Clack WS1 control valve utilizes error codes to diagnose potential issues within the water softening system. These codes are displayed on the valve’s screen, providing valuable insight into the nature of the problem. Refer to the comprehensive error code list within this manual – or the Clack Corporation website – for detailed explanations.
Common error codes may indicate issues with the water supply, low salt levels, valve malfunctions, or flow restrictions. Do not attempt to repair the valve yourself if you are unfamiliar with its components; contact a qualified service technician. Ignoring error codes can lead to further damage and system failure.
Record the error code before contacting support. This information will expedite the troubleshooting process. Regularly checking the display for error codes is a proactive maintenance step, ensuring timely intervention and preventing prolonged disruptions to your soft water supply.

Clack Corporation History & Quality
Established in 1944, Clack Corporation delivers precision water purification technology, providing quality residential, industrial, and commercial water treatment components for decades.
Clack Corporation: Established in 1944
Clack Corporation’s rich history began in 1944, evolving from a modest operation into a leading force in water treatment solutions. For over seventy-five years, the company has dedicated itself to innovation and quality, consistently providing cutting-edge components for residential, industrial, and commercial applications.
Initially focused on serving original equipment manufacturers (OEMs), Clack quickly gained a reputation for precision engineering and reliable performance. This commitment to excellence fueled expansion into broader markets, offering complete water softener systems and components directly to distributors and consumers.
Throughout its growth, Clack has remained steadfast in its dedication to American manufacturing and stringent quality control. This legacy ensures that every Clack product, including the WS1 series and Pro Series WS100, meets the highest standards of durability and efficiency, providing customers with long-lasting, dependable water treatment solutions.
Precision Water Purification Technology
Clack Corporation’s commitment to precision water purification technology is evident in every aspect of its product design and manufacturing. They deliver advanced capabilities for water treatment, focusing on innovative solutions that address a wide range of water quality challenges. From the intricate engineering of the WS1EE Twin Alternating Control Valve to the robust construction of their brine tanks, Clack prioritizes performance and longevity.
Their systems, like the Pro Series WS100 On Demand, are engineered for simplicity and efficiency, utilizing advanced regeneration cycles to minimize water and salt usage. Clack’s dedication extends beyond components; they provide comprehensive solutions for OEMs and end-users alike, ensuring access to clean, safe, and reliable water.
This dedication to technological advancement and quality control solidifies Clack Corporation’s position as a trusted leader in the water purification industry, offering solutions that meet the evolving needs of a diverse clientele.