Castle Water is the UK’s largest independent business water retailer. If you’re looking to switch or have been identified as a "Gap Site", your business needs the right water retailer with the expertise to manage your account and the influence to support you when it really counts. Unlike some other large water retailers, we’re not owned by or associated with any water network owners. We are wholly independent, adept at challenging network owner decisions and we work proactively with them to ensure your charges are fair and accurate.
With more 5* Trustpilot reviews than all other water retailers combined, you’re in safe hands with Castle Water.
Our Ayrshire-based team ensure that you receive the best possible service at the right price. With transparent quotes (no hidden retail fees in the small print!), and a range of flexible contract and billing options (including Consolidated Billing at no extra charge!), you can choose the solution that fits your needs.
Our market-leading customer portal puts you in control of your Castle Water account – submit reads, view invoices, update your details and much more, 24 hours a day.
We have more meter readers than any other UK water retailer, ensuring accuracy of your invoices.
With a decade of experience, and more than 16,500 5-star reviews on Trustpilot, we’re trusted by more than 250,000 UK customers to provide market-leading business water services.
Our friendly team would love to tell you more! Give us a call today and find out what Castle Water can offer you.