Retailers
We are dedicated to helping the retailers who provide account services to businesses in our supply area.
Open Water
Most businesses in England have been able to choose which company (known as a retailer) supplies their water services such as account management, billing and customer service, since 2017.
If you were a SES Water business customer and have not switched your retail service provider you will now be served by SES Business Water. Details about how to contact your retailer can be found on the Open Water website.
Do we supply your water?
To find out if we are your water supplier simply enter your business postcode
We have a Wholesale Service Desk dedicated to liaising with retailers. We aim to deliver excellent customer service to both business customers and retailers and will manage the communication of planned and unplanned work to ensure retailers are kept informed.
Our team also supports retailers to establish contracts and offer ongoing support throughout the contract period. They offer advice on internal processes, conducting periodic performance reviews, escalating issues when required and recommending improvement initiatives. The team can also advise on the additional services we offer such as meter reading or obtaining meter data from loggers.
Charges and billing
All charges, both primary and non-primary, are published in our Wholesale Charges 2024-25 document. This includes charge rates and any specific conditions associated with our service. Invoicing for water supplied will be in accordance with the market settlement reports which are based on our wholesale charges. Invoice queries should be directed to the contact shown on the invoice. Escalations of invoice queries will be handled by the account manager.
Forms
Please use the retailer forms available on the MOSL website.
Non-Household Leak allowance’s
We confirm in our Leak Assistance and Allowance Policy under ‘Limitations’ in ‘Section 3, Leak allowances’, that we do not provide leak allowances for customers who use their water supply for commercial purposes. In certain circumstances we may consider an allowance, but these requests are assessed on an individual basis and are subject, but not limited to the following criteria:
- Regular 6 monthly meter reads or monthly meter reads are available dependent on the frequency set up in the central marketing operating system (CMOS).
- All CMOS data is up to date.
- If an allowance is granted by us, it will be offered on a one off basis and no further allowances will be provided for any future occurrences of leakage that may take place.
- An application for a leak allowance must be submitted to our Wholesale Service Team within 6 months of the repair being completed.
More information on Leakage Assistance and Allowance can be found in our Policy below. If you have any questions about leakage taking place on a non-household property or allowances, please get in touch with our Wholesale Service Team using the contact details below.
Contact us
The Wholesale Service Desk is available Monday to Thursday from 8am to 5pm and on Friday from 8am to 4:30pm.
wholesaleservicedesk@seswater.co.uk
Call 0203 968 9805 during working hours and use 01737 772000 for emergency issues.
Useful information
- SES Water - self-help leak test (618KB)
- SES Indicative WS charges 2025-26 (353KB)
- SES Board Assurance Indicative charges 2025-26 (216KB)
- SES Indicative Charges Statement of significant changes 202526 (178KB)
- SES indicative wholesale charges 2025-26 (26KB)
- NHH WS charges 2024-2025 (437KB)
- NHH charges 2024-25 (23KB)
- SES Indicative WS charges 2024-25 (452KB)
- Board assurance indicative charges 2024-25 (118KB)
- SESW Statement of significant changes indicative 2024-25 (181KB)
- SES NHH indicative charges 2024-25 (25KB)
- NHH WS final charges 2023-24 FINAL (421KB)
- Board assurance of final charges 2023-24 (127KB)
- SES Statement of significant changes 2023-24 (219KB)
- NERA Final assurance letter (243KB)
- NHH charges 23-24 final (827KB)
- SES Water Indicative Wholesale Charges 2023-24 (23KB)
- SESW 2023-24 indicative tariffs - Board assurance FINAL (149KB)
- SES Water Statement of signficant changes indicative 2023-24 (165KB)
- SES Water Indicative Wholesale charges for businesses 2023-24 (298KB)
- Metering guidance for retailers (30KB)
- Accredited entities addendum 6docx May 2024 (59KB)
- SES Water Meter Accuracy Test Policy (135KB)
- Access code (1.1MB)
- Metering of Business Properties Factsheet (157KB)
- Board assurance of final charges 2021-22 (76KB)
- NHH WS final charges 2022-23 (386KB)
- Credit and Settlement Timetable 2024-25 (146KB)
Good practice
The Retail Wholesaler Group (RWG) is a group made up of wholesalers, retailers, the non-household market operator (MOSL), Ofwat and CC Water. The group works towards improving overall customer service in the market by putting together good practice guides, which address operational issues. Copies of the RWG good practice guides can be found on the MOSL website.
Credit Agreements
Loss of profit claims
Please visit our loss of profit page here for more information.