Schools, colleges and public buildings need water treatment because they serve large numbers of people through shared kitchens, showers, drinking points and heating systems, often on tight maintenance budgets. Hard water scales up boilers, water heaters and showers, drinking water must be available and appealing, and buildings that sit empty over holidays need careful Legionella management.

Why water quality matters in shared buildings

Drinking water for pupils and visitors

In England, the school food standards require free, fresh drinking water to be available to pupils at all times, and Wales has its own equivalent requirement. Mains water is safe to drink, but chlorine taste and particles can put people off. Filtered drinking points and bottle fillers make water more appealing, which supports healthy drinking habits.

Boilers, water heaters and heating systems

Hard water carries dissolved calcium and magnesium, which settle as limescale whenever water is heated. In boilers, calorifiers and water heaters, scale insulates the heating surface, so more energy is used to reach temperature and components wear out sooner. In buildings with large hot water demand, that adds up quickly.

Showers and changing rooms

Sports halls and leisure facilities run showers heavily at peak times. Scale blocks showerheads and thermostatic valves, cutting flow and causing temperature problems. Softened water keeps outlets flowing and reduces the time caretakers spend descaling.

Kitchens

School and canteen kitchens rely on combi ovens, dishwashers and water boilers that are all vulnerable to scale. Our guide to water treatment for cafés, restaurants and bars covers catering equipment in detail.

Legionella and buildings with holiday closures

Anyone in control of premises with hot and cold water systems must assess and control the Legionella risk, as set out in HSE's Approved Code of Practice, L8. HSE's guidance on hot and cold water systems explains that stagnant water favours Legionella growth, and that systems should be kept clean and at the right temperatures.

Schools and colleges are a particular case because outlets can sit unused for weeks over the holidays. Your control scheme should cover flushing little-used outlets and what happens before the building reopens. Scale-free heaters and pipework make temperatures easier to hold, so water treatment supports this work, but it does not replace a risk assessment.

Which treatment does which job?

Area Main problem What helps
Drinking points and bottle fillers Chlorine taste, particles Drinking water filters on an unsoftened supply
Boilers, calorifiers and water heaters Scale on heating surfaces A commercial water softener, or a duplex softener for continuous supply
Showers and changing rooms Blocked showerheads, sticking valves Whole-building softening from a simplex or duplex softener
Kitchens Scale in ovens, dishwashers and boilers Food service filters and a commercial cabinet softener
Pipework where a softener is not practical Scale build-up An electronic scale conditioner
Rural sites on a private supply Sediment and bacteria Sediment filtration followed by UV disinfection

Rules worth knowing

  • Drinking water in schools: The school food standards require drinking water to be provided free of charge at all times on school premises in England.

  • Legionella: HSE's Approved Code of Practice L8 applies to anyone in control of premises with water systems.

  • Backflow protection: Kitchen and laundry appliances in non-domestic premises carry a higher backflow risk than at home. See Water Regs UK's guidance on plumbing in appliances.

How to choose the right setup

  1. Test your water hardness. Use a water hardness test kit or our guide on how hard is my water?

  2. Map your water use. List drinking points, showers, kitchens and heating plant, with rough numbers of users at peak times.

  3. Keep drinking water separate. Feed drinking points from an unsoftened supply, and soften the water going to heating, showers and appliances.

  4. Plan for maintenance. Choose systems your caretaker or facilities team can service easily, and set reminders for filter changes and salt top-ups.

  5. Ask us if you are unsure. Send us your hardness reading and building details and we will recommend a setup to suit.

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 parts 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 building

Send us your water hardness reading and a few details about your building, and we will recommend a setup that fits. Contact the Wrekin Water team or shop commercial water softeners.

Frequently asked questions

Yes. In England, the school food standards require free, fresh drinking water to be available to pupils at all times on school premises, and Wales has its own equivalent requirement. Filtered drinking points and bottle fillers can make that water more appealing.

In hard water areas, usually yes. Limescale builds up in boilers, water heaters, showers and kitchen equipment, which raises energy use and maintenance costs. A softener removes the calcium and magnesium that cause scale. Test your water hardness first, as a softener adds little in soft water areas.

Water sitting unused in pipes and outlets for weeks can become stagnant, and HSE guidance notes that stagnant water favours Legionella growth. Your Legionella control scheme should cover flushing little-used outlets and the steps to take before the building reopens.

It is not a legal requirement for a mains supply, but filtering reduces chlorine taste and particles, which encourages pupils to drink more water. Filters must be changed on schedule, because a neglected filter can do more harm than good.

Best practice is to feed drinking points from an unsoftened supply. Softening adds sodium to the water, so most installations soften the water going to heating, showers and appliances while keeping drinking water separate.