When Network Plus needed to validate the integrity of an existing water network in Nottingham, we conducted extensive pressure testing over 4,000 meters of pipeline. This included 2,000 meters of 180mm mains, 1,000 meters of 125mm mains, and 1,000 meters of 90mm mains. Additionally, chlorination, de-chlorination, and water sampling were performed to ensure compliance with regulatory standards and guarantee safe operation.
Similarly, for the HS2 high-speed rail project, we carried out hydrostatic pressure testing on critical systems to confirm their durability and reliability under high-pressure demands. These cases highlight the crucial role of hydrostatic testing in maintaining the integrity of both aging infrastructure and newly installed systems.
But how do you determine whether your project requires this level of verification? Here are five essential questions to guide your decision, based on our experience with major clients like Network Plus and HS2.
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1. Are You Meeting UK Compliance Deadlines?
In the UK, hydrostatic pressure testing isn’t just a best practice—it’s often a legal requirement. Regulations such as the Pressure Systems Safety Regulations 2000 (PSSR) and the Water Supply (Water Quality) Regulations 2016 mandate stringent testing to ensure system integrity and public health safety.
How We Ensure Compliance:
- For Network Plus: Over five months, we conducted pressure testing on 4,000 meters of pipelines, performed chlorination and de-chlorination, and collected water samples to verify compliance with regulatory thresholds. This proactive approach helped Network Plus avoid potential fines and ensured adherence to Environment Agency and HSE standards.
- For HS2: Beyond standard safety protocols, our pressure testing ensured that HS2’s infrastructure met the rigorous performance and durability criteria essential for high-speed rail operations.
- Regulatory audits are becoming increasingly stringent, and missing documentation can lead to project delays, fines, or reputational damage. We help streamline compliance by providing audit-ready reports, customised testing schedules, and end-to-end services covering chlorination, sampling, and verification.
2. Is Your System Aging or Newly Installed?
Hydrostatic pressure testing is critical for both aging networks and brand-new installations. Older systems are prone to degradation over time, while new systems may contain hidden manufacturing flaws.
- Pressure testing on 2,000m of 180mm mains revealed structural vulnerabilities.
- Chlorination and de-chlorination addressed biofilm buildup common in older pipelines.
- Water sampling ensured the network met modern quality standards, preventing potential leaks or contamination risks.
- We tested newly installed pressure systems to validate their ability to withstand extreme operational demands.
- Testing confirmed compliance with specialised standards for national infrastructure projects.
How We Adapt to Your System:
- For aging systems: We focus on corrosion analysis, historical wear assessment, and retrofitting compatibility.
- For new installations: We verify material quality, installation accuracy, and stress resilience.
If you’re uncertain about your system’s condition, our experts can conduct an assessment to determine the need for testing.
3. Could a Failure Endanger People or the Environment?
Hydrostatic pressure testing is not just about meeting regulations—it’s about preventing environmental damage and protecting public health.
HS2: Safeguarding Critical Infrastructure
- Our hydrostatic testing simulated extreme pressures to ensure pipeline resilience.
- By identifying weaknesses before operation, we minimised the risk of leaks disrupting transport networks or affecting sensitive ecosystems.
Network Plus: Protecting Nottingham’s Water Supply
- By integrating chlorination and sampling into the testing process, we ensured water safety for residential and commercial users.
- Early involvement in the project prevented costly contamination risks and ensured compliance from the outset.
How we minimise risk:
- Pre-testing consultations to identify potential vulnerabilities.
- Advanced diagnostic tools to detect flaws not visible in routine checks.
- Comprehensive disinfection services to eliminate microbial risks.
4. Have You Experienced Leaks or Pressure Drops in the Past?
Recurring leaks or pressure fluctuations indicate underlying weaknesses in a system. Addressing these proactively can prevent more significant failures and extend the lifespan of your infrastructure.
How We Resolve Recurring Issues:
We identify failure points, conduct chlorination, and test for contaminants that accelerate corrosion.
We provide preemptive diagnostics to detect material or joint flaws before operation.
By taking a proactive approach, our services help clients prevent costly repairs and ensure long-term reliability.
5. Are Insurers Requiring Proof of Integrity?
Insurance companies increasingly require hydrostatic pressure testing documentation as part of risk assessments. Failing to provide proof of system integrity can result in higher premiums or policy rejections.
Why Insurers Demand Hydrostatic Testing:
- Risk Reduction: Validates infrastructure reliability, reducing the likelihood of claims.
- Coverage Eligibility: Many policies require up-to-date test certificates for renewal.
- Cost Savings: Properly tested systems qualify for lower premiums due to reduced failure risks.
How We Support Clients with Insurer-Approved Testing:
- Comprehensive reports, including pressure test certificates, chlorination records, and compliance statements.
- Rigorous flaw detection using state-of-the-art testing methods to identify micro-leaks or structural weaknesses.
- Integrated services (chlorination, flow surveys, CCTV inspections) to streamline certification processes and accelerate approvals.