Looking to switch your water supplier?

We’re the UK’s leading independent business water supplier.

Why switch your water to Castle Water?

  • We could save you up to 20% on your water and wastewater bill
  • We’ve got more 5-star Trustpilot reviews than all other water retailers combined
  • We can provide services to any type or size of business, in any location
  • We make switching easy and stress free
  • Our customer services are UK-based only
  • We provide extended opening hours, Mon – Fri, 8am – 6pm

Request a quote

For a business water quote, please choose from one of the following options:

Buying all your utilities together can generate greater business savings. Now we can bundle your water supply with gas and electric. How much could you save? Request an energy quote today!

  • water efficiency switch


    Switching is easy. Start saving today.

    more info
  • water efficiency additional services


    We provide a range of additional services.

    more info
  • water efficiency water efficiency


    Read our useful water saving tips.

    more info