Understanding your water
We test water hardness, pH, TDS, Silica, Chloride, Iron, Copper, Manganese, and trace metals. After analysis, we recommend the right water filter for your needs and equipment. Request a water testing kit to check your site or kitchen water quality. Return it in the free-post envelope for an analysis report and treatment advice.
Temporary hardness, also known as carbonate hardness, is caused mainly by dissolved calcium and magnesium bicarbonates. When water is heated, these compounds can form insoluble carbonate deposits, creating limescale on boilers, heating elements, pipework and internal equipment components.
Temporary hardness is particularly important for appliances that heat or generate steam from water.
Indicative WaterCare guidelines:
- Commercial coffee machines: approximately 80ppm as CaCO₃ may provide a useful balance between scale control and mineral content for extraction. The coffee-machine manufacturer’s requirements and desired beverage profile should always be checked.
- Combi and steam ovens: generally below 40ppm as CaCO₃, subject to the oven manufacturer’s specification.
- Commercial glasswashers and ice machines: generally below 20ppm as CaCO₃ where scale and mineral deposits must be closely controlled.
Temporary hardness may be estimated through acid titration using dilute sulphuric acid and a bromocresol-green/methyl-red indicator. Strictly, this test measures total alkalinity to a defined endpoint. In many natural waters, the result provides a useful approximation of carbonate hardness, but other alkaline compounds may affect the reading.
How it works
Purchase your replacement filter
Order your replacement CTU filter at the standard purchase price when it’s time for a change.
Return your used filter
Send your used CTU filter back to WaterCare using our simple returns process.
Inspection & regeneration
We inspect every returned filter and, where suitable, professionally regenerate it for future reuse.
Receive your account credit
Once your filter has been processed, you’ll receive a credit on your account—saving money while supporting a more sustainable, circular approach to water treatment.
Ready to recycle?
If you’re ready to get your used CTU filters back in operation, WaterCare can help. Contact us today to learn about our programme.
Research & development
We pride ourselves at being at the forefront of water treatment technology and have a dedicated manufacturing facility and laboratory where we can design, build and test our innovative products before bringing to market.
Our UK headquarters manufacturing, warehousing and recycling facility in Essex provides all your water treatment solutions and services under one roof. Our systems, manufacturing and environmental standards have attained ISO 9001, 14001 & 45001 certification.
