Rising Main Pressure Testing
Specialist rising main pressure testing for pumped systems, wastewater networks, and water infrastructure across the UK.
Rising mains operate under higher pressures than standard gravity-fed pipelines, making accurate testing essential for confirming performance, reliability, and long-term safety. Our rising main pressure testing identifies leaks, weaknesses, and structural issues before they lead to failures, blockages, or costly service disruption.
What Is a Rising Main?
A rising main is a pressurised pipeline used to pump water or wastewater from a low point to a higher point or treatment facility. Because these mains operate under constant or fluctuating pump pressure, they experience greater mechanical stress than most pipelines, making specialised pressure testing critical for ensuring safe and reliable operation.
Key Benefits
Confirms Rising Main Integrity
Verifies that the main can withstand pump pressure without leaks, bursts, or structural failures.
Prevents Interruptions
Detects weaknesses before they lead to pump shutdowns, backups, or environmental incidents.
Essential for Compliance
Provides the documentation required for commissioning, refurbishment, and regulatory approval.
Rising Main Testing Process
Our rising main pressure testing begins with isolating the main and ensuring the system is ready for accurate testing. Water is then introduced gradually, allowing the pipe to stabilise before controlled pressurisation is applied to reach the specified test pressure. During the test, pressure levels are continuously monitored and digitally logged to identify drops or fluctuations that may indicate leaks or weak points. After the test is complete, we provide a full report including pressure graphs, observations, and pass/fail certification.
When Is Rising Main Testing Required?
Rising main testing is required for new pumped systems, refurbished pipelines, and after repairs or modifications to existing mains. It is also used when pumps trip or lose prime, when there is unexplained pressure loss, or when a blockage, failure, or leak is suspected. Regular testing helps prevent breakdowns, reduces operational risks, and ensures the system is safe for service.
BS EN 805
Water Industry Specifications (WIS)
Water UK Standards
Water Quality Regulations 2016
All hydrostatic testing is carried out in accordance with UK water industry regulations and documented for commissioning and handover.
Why Rising Mains Require Special Attention
Rising mains experience continuous pressure surges from pump starts and stops, creating a higher risk of leaks, bursts, and pipe fatigue. Because of this, rising mains often fail long before gravity pipelines. Specialist pressure testing helps detect problems early, extend asset life, and prevent environmental damage caused by wastewater escapes.