Customer Notice

Our offices and phone lines will be closed on Monday 27 May for the Bank Holiday. We will reopen on Tuesday 28 May at 8am. You can still make a payment online. If you experience an emergency or unplanned disruption to your water supply and/or wastewater service whilst we are closed, please call your Water Network Owner. You can find a list of emergency numbers here. If you experience a problem with the water pipework inside your own building/site, you should call your plumber in the first instance.

Get £50 cashback when you transfer your energy with Castle Water.
Save £££s on your energy bill.


Cut costs with lower business energy prices.

Snap up our competitive electricity and gas prices.

How much could you save? Get a quote today!

Quote my energy

Why switch Gas and Electricity with Castle Water

You buy your water from us. We already provide one service, which makes it more efficient to add other utilities to your account.

Buying all your utilities together can generate greater business savings. Castle Water is an efficient, low cost yet high service supplier of water. We drive down costs so that we can pass savings on to you. We supply hundreds of thousands of business water customers in London and southern England. Now we can bundle your water supply with gas and electric.

Contact us today

T&Cs: Energy cashback is a limited offer to celebrate the launch of our energy sales service. It is only available until 30 June 2019. Cashback is payable once your energy contract commences. We reserve the right to close this offer prior to 30 June 2019.

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  • water efficiency additional services


    We provide a range of additional services.

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  • water efficiency water efficiency


    Read our useful water saving tips.

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