Still paying separately for your business water and waste? You could be flushing your time and money down the drain.
But it doesn’t have to be that way. With Castle Water, combine water and waste to receive one simple bill – and save money in the process.

You choose…


We will credit your Castle Water account with £50, or we will send you a £50 Amazon e-voucher, or we will make a £50 donation to Save The Children (Charity registered in England and Wales (213890) and Scotland (SC039570))

Our guarantee

  • UK-based customer services and Account Managers
  • Extended opening hours from Mon – Fri, 8am – 6pm
  • Same scheme of charges and no disruption of supply
  • Pay simply with direct debit, protected by the Direct Debit Guarantee

Not an existing customer? You can still switch your services to Castle Water and receive £50 cashback. Click here.

Apply Now



Please use your supply address postcode. You can find your customer account number on your Castle Water bill. (e.g. CW1234567890 / TW1234567890 / PORT1234567890).

*Click here for full T&Cs. To find out more about this offer view our FAQs. Offer valid until 28 February 2019. Ref: CB50/05

Having difficulties?

Contact a member of our team or Skip to the next step

* The merchants represented are not sponsors of the Castle Water Cashback Offer or otherwise affiliated with Castle Water. The logos and other identifying marks attached are trademarks of and owned by each represented company and/or its affiliates. Please visit each company's website for additional terms and conditions.

  • CUT YOUR COSTS

    Reduced rates and improved services.

    more info
  • HOW TO SWITCH

    Switching is easy. Just follow these easy steps.

    more info
  • HOW TO PAY

    Learn more about your payment options.

    more info