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Polyphosphate Crystals


Our Polyphosphate Crystals are a food grade water treatment media used to treat hard water. Polyphosphate works by slowly dissolving into your water and coating hardness forming molecules like calcium to prevent them from sticking to surfaces and causing limescale. Suitable for drinking water systems, refillable filter cartridges and other solutions that use Polyphosphate for scale control – such as those used to protect combi-boilers or washing machines.

Why Choose Our Polyphosphate Crystals?

  • Food grade Polyphosphate in crystal form
  • Used to protect against limescale damage
  • Suitable for drinking water applications
  • Available in a number of pack sizes

Need help with our Polyphosphate Crystals? Give us a call on 01622 933 853


Polyphosphate is a popular water treatment media thanks to its effectiveness at preventing limescale, corrosion and issues caused by iron and manganese. Commonly found in drinking water filters and single appliance scale prevention systems such as for dishwashers, washing machines and boilers. Over time the Polyphosphate crystals dissolve into the water, meaning they need to be replaced when depleted. Thankfully, many systems that use this media are refillable allowing customers to purchase the replacement media for top ups as and when required.

Our Polyphosphate media is supplied in crystal form and is suitable for use within a range of OEM systems such as Combimate or Fernox. For customers who are unsure of the quantity they require, please get in touch before placing your order or refer to the ‘specification’ tab for more information.

Please refer to the ‘specification’ tab to find the quantity of crystals required for different systems

Key Product Information:

  • Treats calcium, iron and manganese
  • Suitable for use with drinking water
  • Inhibits corrosion in pipework
  • Alternative to siliphos balls
  • Bulk polyphosphate refill

Compatible Products

Need help with our Polyphosphate Crystals? Give us a call on 01622 933 853


Suitable For

Home & Domestic, Commercial, Light Commercial, Washing Machines, Dishwashers, Glass Washers, Boiler Protection, Drinking Water


Food Grade

Max Hardness

500ppm CaCO₃

Compatible Systems

Fernox Bag In Tank (400g)
Combi Mate (800g)

Max Temperature

Point Of Use Systems 75-80⁰C
Point Of Entry Systems 35⁰C

frank woolnough
frank woolnough
The first time using this site, and im more than pleasd with the service and delivery of the product. Will use again no problem.
Gary Kinsley
Gary Kinsley
Excellent service, fast delivery (although there was no urgency) and great after sales service from Becky who's very helpful and knowledgeable.
Eamonn Dorling
Eamonn Dorling
Prompt and well informed service
Marco Polo
Marco Polo
This company gives the best customer service I have EVER EXPERIENCED in the UK. If every company gave this much care and attention to their customers the UK would easily lead the world in business. Truly ⭐️⭐️⭐️⭐️⭐️ I cannot recommend enough Marco Crawford
Gary Barbour
Gary Barbour
The team were brilliant offering great advice, very knowledgeable on their products and I will definitely be using them again!
Alice Sefton
Alice Sefton
Really great service, I wasn't too sure what size of water filter to order so sent in a picture, the size was identified and the new filters were with me a day after purchase.
Jill and Garry Clark
Jill and Garry Clark
Excellent service.
Matthew Durdy
Matthew Durdy
Prompt service and follow up. Like it should be.
Resin cleaner turned up on time and worked as expected. Great service - Will use again

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