Water Treatment Solutions: Purification & Filtration

Advanced Purification & Filtration Solutions

Filtration and purification systems are critical to water treatment facilities because they ensure water is safe, clean, and compliant with regulatory standards. These systems remove a wide range of impurities, including physical particles, dissolved chemicals, and harmful microorganisms. The process begins with sediment filtration, which captures larger particles such as sand, silt, and rust. Advanced facilities often use membrane technologies like ultrafiltration or reverse osmosis to eliminate microscopic pathogens and dissolved solids, providing added protection for public health.

Beyond improving water quality, filtration and purification systems support sustainability and resource management. They serve applications ranging from municipal drinking water to industrial processes that require ultra-pure water. Modern systems integrate automated controls and monitoring to optimize performance and reduce energy use. Filtration and purification systems remain the backbone of water treatment operations, ensuring a reliable supply of safe water while promoting environmental responsibility.

Controllers

Controllers are essential in water treatment facilities for automating and regulating the various processes that ensure water quality and system efficiency. These devices monitor inputs from sensors measuring parameters such as pressure, flow rate, chemical concentration, and water level, then adjust equipment operations accordingly. For example, controllers can regulate pump speeds, open or close valves, and manage chemical dosing systems to maintain optimal treatment conditions. By automating these adjustments, controllers reduce the need for manual intervention and help maintain consistent water quality standards.

Modern controllers often integrate with SCADA (Supervisory Control and Data Acquisition) systems, enabling centralized monitoring and remote control of the entire facility. This connectivity allows operators to receive real-time alerts, analyze performance data, and make informed decisions quickly. Advanced controllers can also implement programmed logic for energy efficiency, emergency shutdowns, and compliance with regulatory requirements. In short, controllers serve as the “brains” of water treatment operations, ensuring precision, reliability, and safety across all stages of the process.

  • Instrumentation and Gauges

Tanks

Tanks are fundamental components in water treatment facilities, serving as storage and processing units throughout various stages of the treatment cycle. Raw water from natural sources such as rivers, lakes, or reservoirs is first directed into large intake tanks, where initial settling removes heavy sediments and debris. These tanks create a controlled environment for preliminary treatment, ensuring that water entering later filtration and purification stages is free from large particles that could harm equipment or reduce efficiency.

Beyond initial storage, specialized tanks support chemical treatment, disinfection, and distribution. Coagulation and flocculation tanks allow chemicals to bind with suspended particles, making them easier to remove during sedimentation. Chlorination or ozone tanks provide proper disinfection before water is considered safe for consumption. Clear water tanks then store treated water before it is pumped into the distribution network. By maintaining careful control over flow rates, retention times, and chemical dosing, these tanks help achieve consistent water quality and meet regulatory standards.

  • Tanks and Containment

Structural FRP (Fiberglass-Reinforced Plastic)

Structural FRP systems play a critical role in water treatment facilities by providing safe, durable access and support infrastructure throughout the plant. FRP grating, platforms, stairs, and handrail systems are used around tanks, clarifiers, basins, and processing equipment, allowing operators to safely inspect, maintain, and service critical assets. Their inherent corrosion resistance makes FRP ideal for harsh, wet, and chemically aggressive environments commonly found in water and wastewater treatment operations. 

Beyond access and safety, structural FRP systems help improve facility longevity and reduce lifecycle costs. Unlike steel or aluminum, FRP does not corrode, rust, or require frequent coatings, significantly lowering maintenance demands and downtime. Lightweight yet structurally strong, FRP components are easier to install and modify, reducing on-site labor and improving safety during construction and retrofits. By providing long-lasting, non-conductive, slip-resistant access solutions, structural FRP systems help facilities maintain safe operations, protect personnel, and support reliable treatment performance over the life of the plant.

  • Fiberglass Stair, Handrails, Grating and Structural Components

Pumps

Pumps play a central role in water treatment facilities by moving water through each stage of the treatment process. They draw raw water from rivers, wells, or reservoirs and push it into intake structures for initial screening. High efficiency pumps then transfer water through coagulation, sedimentation, filtration, and disinfection systems, ensuring steady flow and proper pressure. Their reliable operation keeps treatment performance consistent and prevents disruptions that could affect water quality.

Beyond process flow, pumps support chemical dosing, backwashing of filters, sludge handling, and distribution of treated water into the supply network. Facilities use pump types such as centrifugal, positive displacement, and submersible units to match each application. Modern control systems allow operators to adjust speed and output to save energy and maintain accurate flow rates. By supporting every major treatment step, pumps help provide a safe and dependable supply of clean water.

  • Pumps

PumpMan

PumpMan, a Harrington Company, provides pump system expertise along with on site and off site repair, replacement, and maintenance for pumps, motors, controls, valves, and water wells used across municipal, industrial, and commercial sectors in North America. With strong technical knowledge and a commitment to dependable service, PumpMan helps facilities keep essential water and wastewater operations running with reliable performance and reduced downtime.

PumpMan technicians support full system life cycles through troubleshooting, planned maintenance, and equipment upgrades that improve efficiency and extend asset life. Services include precision alignment, vibration and noise checks, motor and control panel inspections, and flow and pressure verification to maintain optimal operation. Select locations also offer wastewater sump pumping and debris removal to prevent clogs and improve system reliability, making PumpMan a trusted partner for critical infrastructure.

  • Pump Service, Repair and Replacement 

Piping Systems (PVC, CPVC, PVDF, FRP and Lined Steel)

PVC, CPVC, PVDF, FRP, and lined steel piping systems are essential in water treatment facilities because they provide reliable flow control, corrosion resistance, and long service life across a wide range of operating conditions. PVC is commonly used for raw water intake, distribution to filtration units, and low-pressure applications due to its broad chemical resistance, ease of installation, and cost effectiveness. CPVC offers increased temperature and pressure capability, making it well suited for hot water service, chemical feed lines, and applications requiring enhanced mechanical strength.

PVDF piping is selected for high-purity and highly aggressive chemical services where superior chemical resistance, temperature tolerance, and long-term performance are critical. FRP piping is used in the most corrosive environments, including chemical treatment areas, disinfectant storage, and high-exposure washdown zones, where its strength and non-corrosive construction help extend system life. Lined steel piping provides the structural strength of steel combined with corrosion protection, making it ideal for larger-diameter lines, higher-pressure systems, and applications requiring robust mechanical durability.

Together, these piping systems support sedimentation, filtration, disinfection, and final distribution by maintaining safe, consistent flow throughout the facility. Proper material selection across these piping technologies reduces maintenance requirements, improves system reliability, and supports long-term water quality and operational performance.

  • Chemical-Grade PVDF Piping and Fittings 
  • CPVC Piping, Valves, and Fittings 
  • FRP (Fiberglass Reinforced Plastic) Piping
  • Lined Steel Piping
  • Cements & Primers
  • Double Containment Piping 

Filters

Filters play a vital role in water treatment facilities by removing sediment, organic matter, and microorganisms that affect clarity and quality. Many systems begin with media filters that trap sand, silt, and suspended solids as water passes through layers of gravel, sand, or anthracite. Facilities often add membrane filters for finer control, allowing operators to capture smaller particles and improve protection for downstream equipment. These filtration stages create cleaner water and help each step of the treatment process function more efficiently.

Beyond primary treatment, filters support activated carbon units that remove taste, odor, and dissolved chemicals. Cartridge filters are used to polish water before it moves to disinfection or enters sensitive equipment. Routine backwashing and cartridge changes help maintain performance and reduce fouling. By controlling solids, protecting pumps and membranes, and improving overall water quality, filters remain essential to producing safe, reliable drinking water for communities.

  • Filtration Media
  • Filter Membranes, Cartridges and Bags

Filter Housings

Filter housings play an important role in water treatment facilities by holding and protecting the filtration media or cartridges that remove sediment, debris, and microorganisms from incoming water. They create a controlled space where water flows through the filter material at the correct rate, ensuring consistent removal of particles and protecting downstream pumps, membranes, and disinfection systems. Durable materials such as stainless steel, PVC, and FRP allow these housings to withstand pressure, chemicals, and continuous operation.

In addition to primary filtration, housings support activated carbon, fine polishing filters, and specialty cartridges used for taste, odor, or chemical reduction. Their modular design allows operators to change filter elements quickly and maintain stable performance with minimal downtime. Multi-round housings increase capacity for high flow systems, while clear housings allow easy visual inspection. By safeguarding filtration components and ensuring reliable flow, filter housings help maintain water quality and support the overall efficiency.

  • Housing & Strainers

RO Membranes

RO membranes are semipermeable barriers that separate water molecules from dissolved salts, organics, and fine particulates. Made from thin polyamide layers wound into compact elements, they act as a selective filter, producing high-purity water. Their structure allows water to move through the membrane surface while preventing most dissolved ions from passing. This makes them a vital part of advanced treatment systems that aim to reduce total dissolved solids and improve overall water quality.

In water treatment facilities, RO membranes operate inside pressurized vessels where feedwater flows across the membrane surface. Clean permeate passes through the membrane and into a collection tube, while concentrated impurities are rejected as a separate stream. Facilities use RO systems to support potable water production, wastewater reuse, industrial process water, and desalination. Their efficiency, reliability, and low chemical demand make them a preferred technology for meeting strict quality standards.

  • Media Filters

Gauges

Gauges in water treatment facilities are primarily used to monitor and control critical parameters throughout the treatment process. They provide real-time readings of pressure, flow rate, and sometimes temperature within pipes, tanks, and filtration systems. Pressure gauges, for example, help operators ensure that pumps and filtration units are functioning within safe operating limits, preventing damage to equipment and maintaining consistent water flow. Flow gauges measure the volume of water moving through the system, which is essential for balancing treatment stages and meeting regulatory requirements for output.

In addition to operational monitoring, gauges play a key role in troubleshooting and maintenance. Abnormal readings can indicate issues such as clogged filters, pump malfunctions, or leaks in the system. By providing accurate and immediate feedback, gauges allow operators to make timely adjustments, reducing downtime and improving efficiency. In advanced facilities, these gauges are often integrated with automated control systems, enabling remote monitoring and alerts for critical conditions. Overall, gauges are indispensable for maintaining safety, reliability, and compliance in water treatment operations.

  • Instrumentation and Gauges

Automated Valves / Valve Actuation

Valve actuation is vital in water treatment because automated valves deliver precise, programmable control of flow, pressure regulation, and system isolation throughout each stage of treatment. These automated valves manage chemical dosing, filtration and backwash sequencing, and distribution flow with consistent accuracy that supports stable process conditions and water quality. When integrated with SCADA or PLC systems, they allow remote adjustments, reduce manual labor, and maintain hydraulic stability that protects equipment and improves overall plant efficiency.

Harrington supports these technical needs with a full range of valve actuation services, including custom mounting, engineered fabrication, and the conversion of manual valves into automated valves. The Valve Actuation Group combines automation expertise with in-house machining, welding, and testing to build assemblies tailored to site requirements. Working across many valve types and brands, Harrington delivers automated valve packages designed for corrosive fluids, elevated pressures, and continuous duty applications, helping facilities operate safely and with greater control.

  • Media Filters

Valves

Valves are essential components in water treatment facilities, controlling the flow, pressure, and direction of water throughout the system. They allow operators to start or stop flow, regulate pressure, and isolate sections of piping for maintenance without disrupting the entire facility. Common types include gate, ball, butterfly, and check valves, each selected for specific functions such as controlling chemical feed, managing pump output, or diverting flow between treatment processes.

In addition to basic flow control, valves help maintain safety and efficiency by preventing backflow, overpressure, and contamination between process stages. Automated valves with electric or pneumatic actuators provide precise control and can be integrated into monitoring systems for real-time operation. Properly installed and maintained valves support consistent water quality, protect equipment, and enable operators to manage treatment processes effectively while minimizing downtime and maintenance needs.

  • Manual Valves, Actuated Valves

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