Industrial and manufacturing sites need water treatment because water runs through their boilers, heat exchangers, cooling systems and production lines, and poor water quality turns directly into lost efficiency and downtime. Hardness forms scale on heat transfer surfaces, sediment wears pumps and valves, and many processes need purified water to protect product quality.

Why water quality matters on a production site

Boilers and steam systems

Hard water carries dissolved calcium and magnesium, which come out of solution as limescale when water is heated or boiled. In a boiler, scale forms an insulating layer on the heat transfer surfaces, so more fuel is needed to raise the same steam, and the metal underneath runs hotter than it was designed to. Boiler manufacturers specify feedwater quality for this reason, and softening the make-up water is usually the first step towards meeting it.

Heat exchangers and cooling

The same scaling happens wherever water is heated, including plate heat exchangers, jacketed vessels and process chillers. Scale narrows flow paths and cuts heat transfer, so equipment runs longer and harder to do the same job. Treating water before it enters these systems is far cheaper than descaling or replacing equipment later.

Process and rinse water

Many processes need water with a low level of dissolved solids, from final rinses that must dry without spotting to mixing water that must not react with the product. Reverse osmosis removes most dissolved salts, and deionisation can polish the water further where a lower conductivity is specified.

Sediment and particles

Sand, rust and other particles wear pump seals, block spray nozzles and foul downstream equipment, including softeners and membranes. Bag and cartridge filtration removes them at the point where water enters the site or a process.

Which treatment does which job?

Application Main problem What helps
Boiler and steam make-up water Scale on heat transfer surfaces A duplex water softener such as the Clack WS1 TT metered duplex range for an uninterrupted soft supply
Heat exchangers and process heating Scale narrowing flow paths A commercial water softener such as the Clack WS1 CI metered simplex range
Process and rinse water Dissolved solids, spotting, product quality Commercial reverse osmosis, with deionising polishing cartridges where lower conductivity is needed
Incoming sediment and high dirt loads Wear on pumps and valves, fouled equipment Bag filters in stainless steel bag housings
Fine particle control Particles passing coarser filters Spectrum Premier Pleat cartridges in filter housings
Bacteria in process water Microbiological contamination UV disinfection, including the Spectrum Sabre UV range

Rules worth knowing

  • Legionella: Employers and anyone in control of premises must assess and control the Legionella risk from water systems, including hot and cold water services, cooling towers and process water. HSE sets out how in its Approved Code of Practice, L8.

  • Cooling towers and evaporative condensers: Under the Notification of Cooling Towers and Evaporative Condensers Regulations 1992, wet cooling towers and evaporative condensers must be notified to the local authority where they are located.

  • Backflow protection: Equipment connected to the mains in commercial premises often carries a higher backflow risk than the same equipment at home. Water Regs UK explains this in its guidance on plumbing in appliances.

How to choose the right setup

  1. Get a water analysis. Hardness, iron, total dissolved solids and sediment levels all affect what you need. A hardness test kit is a quick first step.

  2. Work out your flow rates. Note both peak flow and total daily volume for each process, along with pipe sizes.

  3. Check equipment specifications. Boilers, washers and process equipment often state the water quality they need.

  4. Decide how much downtime you can accept. If water must be available around the clock, duplex systems and parallel filter housings let one side be serviced while the other keeps running.

  5. Ask us if you are unsure. Send us your water analysis and process details and we will recommend a setup to match.

Why buy from Wrekin Water

Wrekin Water is a family run company based in Bettisfield, Shropshire. We have served more than 50,000 customers over 15 years and are rated Excellent on Trustpilot. We stock Pentair Fleck, Autotrol, Clack, Kinetico and other major brands, so replacement valves, parts and media are easy to source for years to come. Find out more about why customers buy from us, or read about our commercial water softeners.

Get the right water for your site

Send us your water analysis, flow rates and a short description of your processes, and we will recommend a setup that fits. Contact the Wrekin Water team or shop commercial water softeners.

Frequently asked questions

Limescale forms an insulating layer on heat transfer surfaces in boilers, heat exchangers and chillers. That means more energy is needed to do the same job, flow paths narrow, and metal surfaces can run hotter than designed. Softening the water before it enters these systems prevents scale forming in the first place.

A simplex softener has one resin vessel and cannot soften water while it regenerates. A duplex softener has two vessels and switches between them, so soft water is always available. Sites that run around the clock, or where a short supply of hard water would cause problems, usually choose duplex.

When the process specifies a low level of dissolved solids or a low conductivity, for example spot-free final rinses, product mixing water or feed to sensitive equipment. Reverse osmosis removes most dissolved salts, and deionisation can polish the water further where a tighter specification applies.

Bag filters suit high flow rates and heavy dirt loads, and they are quick to change. Cartridge filters are better for finer filtration at lower flows. Many sites use both, with bag filters taking out the bulk of the sediment and cartridges providing finer protection downstream.

Yes. Under the Notification of Cooling Towers and Evaporative Condensers Regulations 1992, wet cooling towers and evaporative condensers must be notified to the local authority where they are located. They also need managing under HSE's Legionella Approved Code of Practice, L8.