If you like Combimate, help us spread the word.


Features & benefits

Since its launch in 1987, Combimate has established itself as one of the most popular and effective solutions for preventing limescale in hard water and soft water corrosion.

Here are just some of the reasons why.

Money saving

  • Combimate has a low purchase cost
  • Ensures your water heating system efficiency is maintained
  • Keeps energy costs down
  • Avoid expensive repairs / replacement of boilers and water fittings
  • Removes need for chemical de-scaling products


  • Protects domestic water systems against hard water limescale and soft water corrosion
  • Extends the life of your water installation
  • Helps maintain your home’s energy efficiency
  • Avoids the time & labour of removing stubborn scale


  • Compact size – easy to locate without losing precious space
  • Configuration options – easy fitment to nearly any pipe configuration
  • Simple compression fittings – clearly marked inlet and outlets with interchangeable fittings
  • 15mm or 22m fittings – Combimate models are available in both of these popular sizes
  • No electrics or drainage required – no need for an electrician or additional plumbing


  • Totally automatic system – no user interaction required
  • Energy-free – no power required
  • Automatic water shut off – easy maintenance and a useful home safety feature
  • Completely safe for human consumption


  • Only requires an annual refill – a five minute task
  • Just a handful of Combiphos needed to refill – no need for bulky salt sacks or heavy lifting
  • A DIY job that requires no special tools.
Buy Online

From just £171.60 (inc VAT)

Combimate will last a lifetime and is virtually maintenance free.

The Combimate de-scaling guarantee

If Combimate is installed with a new boiler and the Combiphos is replaced annually, Cistermiser guarantees that the new boiler, new heat store or new heat exchanger will not scale up.

Cistermiser is so confident in the capabilities of Combimate, when used with Combiphos, that if the unit it is protecting experiences significant scaling, we will contribute up to £500 towards the cost of repair or replacement.*

*Subject to Cistermiser’s warranty policy

£29.40Inc VAT
Combiphos refills

To maintain your Combimate’s effectiveness, we recommend Combiphos is replaced annually.

Buy Online
Don't forget to
register your Combiphos

Register your Combiphos online and
signup to our reminder service.