Permanent diversions, mains relays, decommissioning, and pressure zone alterations. Full approval management with Severn Trent Water.
Every water main diversion follows a clear, auditable sequence. Here is exactly what happens at each stage.
Water main alterations fall into several categories. A permanent diversion installs a new main on an alternative route, replacing the section of main that conflicts with the development. A mains relay relays the existing main at a greater depth on the same or a slightly modified route, typically to accommodate new highway works. Decommissioning removes a redundant section of main from service, with the water company disconnecting and sealing the redundant ends. Pressure zone boundary alterations involve installing or relocating a pressure reducing valve to accommodate a change in the network boundary. USP advises on the most appropriate alteration type for each situation.
All water main alterations require prior approval from Severn Trent Water. USP prepares and submits the diversion application, including the diversion route design, depth of cover confirmation, pipe material specification, continuity of supply plan, and traffic management proposals where required. For pressure zone boundary alterations, the application includes PRV sizing calculations and chamber design. Severn Trent reviews the submission and issues written approval before any groundworks begin. USP manages this process and responds to any queries from the water company's technical team.
With written approval in place, USP mobilises its WIRS-accredited installation team. New pipework is installed on the approved route to the required depth of cover, using MDPE blue pipe or HPPE pipe as appropriate for the diameter. All joints are made by electrofusion welding using qualified welders. Once installation is complete and pressure tested, USP coordinates the water company's non-contestable connection work, which makes the live connection between the new main and the existing network. Continuity of supply to existing customers is maintained throughout in accordance with the agreed plan.
Following installation and the water company connection, USP carries out a formal pressure test of the new main. Where the new main is to carry potable water, chlorination and bacteriological sampling are also required before adoption. All test results, welder qualifications, and as-built drawings are compiled into an adoption documentation pack and submitted to Severn Trent Water. The water company carries out a site inspection and formally adopts the new main. The diverted section of original main is decommissioned by the water company once the new main is live.
Every diversion we complete is pressure tested, adopted by Severn Trent, and supported by a full quality documentation pack.
The critical parameters that govern every water main diversion and alteration.
End-to-end diversion capability from a single WIRS-accredited provider.
Every water diversion we deliver meets the highest industry standards. Worker safety, public safety, environmental responsibility, and project compliance from planning to sign-off.
50 Google Reviews
I contacted USP and within minutes had a chat with Justin who described exactly how the job would be done and provided a comprehensive quote including labour and materials and was able to start the work in just 7 days. Justin and his team were brilliant and did an amazing job. I can highly recommend USP.
Jack and Joel were absolutely amazing this morning and really put themselves out to dig a hole without having to dig another hole in my drive. More work for them but one happy customer.
From the initial quote through to work completion, Justin and his work partner were a mix of professional, knowledgeable, good-humoured, and clear in all explained (I felt an instant ease to agree to the work). The work itself was excellent and they left the place immaculate!
George and Jack come out today to move a gas meter. It wasn't a straightforward job, but they both took time to talk me through what they were doing and what the next steps are. Very friendly and polite and thought about the needs of our family.
Jack and George are great.
Bang on time, completed the work perfectly, no issues. Left the meter really neatly finished. Jack and Joel were very courteous and did a great job.
George and Jack turned up and did a first class job, very friendly and professional. Great job lads.
Jack and Joel were brilliant. Very polite, worked to my highest expectations. Left the area as clean and tidy, as was possible. And explained every step of the process to me, answering any questions I had.
Fantastic work from Jack and Johl.
Tell us about your project and we will send you a free, no-obligation diversion plan within 24 hours.
Prefer to talk? Call 024 7542 6505 for immediate service.