Buyers' Guide to Water Treatment Systems
In any busy kitchen, bar or catering operation, water quality has a direct effect on the performance and lifespan of your equipment. From combi ovens and steamers to ice machines and coffee units, untreated or poorly treated water causes problems that are often not covered under manufacturer warranties.
The two most common causes of equipment faults are operator error or misuse, and damage caused by limescale. This guide explains how to prevent limescale damage and choose the right water treatment system for your operation.
Understanding hard and soft water
Water is classed as hard or soft depending on how much dissolved mineral, mainly calcium and magnesium, it contains. Hard water has a high mineral content and is prone to forming limescale; soft water has a low mineral content and is gentler on equipment.
Even in an area known for soft water, your supply may come from a source with higher hardness than expected, so always check your mains water quality. For official UK guidance, see the Drinking Water Inspectorate.
How limescale affects your equipment
When hard water is heated, minerals attach to metal surfaces and form a hard crust known as limescale. A new heating element can lose up to 30% of its efficiency within a few weeks of exposure to limescale. Reduced efficiency means higher energy costs and faster wear, and over time critical components can fail prematurely in ovens, ice machines and coffee units. Preventing limescale is cheaper than repairing the damage it causes, and keeps performance consistent.
Types of water treatment system
Salt-based softeners
Salt-based systems use resin beads to remove calcium and magnesium from hard water. Automatic softeners suit large-scale operations such as pass-through dishwashers and regenerate on a timer; manual softeners suit smaller appliances like under-counter glasswashers, with regeneration carried out by hand using granular salt.
Salt-based softeners should not be used with drinks or ice machines, as the resulting increase in sodium can be a concern for infants, the elderly, or anyone on a low-sodium diet. Browse our water softeners.
Water carbon filters
These filters improve taste, clarity and odour by removing chlorine and discolouration, but they do not reduce hardness. They work best for draught soft drinks, drinking water and coffee machines in soft water areas.
Scalegard and calcium treatment units
Scalegard filters remove water hardness without adding sodium, making them well suited to combi ovens, steamers, ice machines, beverage dispensers and vending machines. They protect equipment while keeping water flavour and safety intact.
Reverse osmosis (RO) systems
Reverse osmosis forces water through a fine membrane to remove limescale and most trace minerals, producing highly pure water ideal for exceptionally hard water or specialist applications. Removing trace elements can slightly change the flavour of beverages, so it's worth considering where this matters.
Choosing the right system
To choose the right system, consider the water hardness in your area, the type of equipment you're protecting, your daily water volume, and any health and safety requirements such as sodium restrictions. Work with a trusted supplier or manufacturer, who can recommend the right system and installation for your investment.
Maintaining your water treatment system
Salt-based softeners need salt refilled and a regeneration schedule followed; carbon filters should be replaced per the manufacturer's guidelines; Scalegard and RO systems need flow rates monitored and membranes replaced as needed. Regular checks keep energy use down, extend equipment life, and support food safety compliance.
Key takeaways
Do: test your mains water regularly, install the right water treatment for your appliances, follow manufacturer maintenance schedules, and monitor sodium levels if you use a salt-based system.
Don't: ignore signs of limescale, use salt-based systems with ice or drinks machines, or delay replacing filters or membranes.
Water treatment is one of the most cost-effective ways to protect your kitchen and bar equipment. The right system reduces energy costs, prevents downtime, and keeps your food and drink tasting as it should. Call us on 01304 873469 to discuss the right system for your equipment.