Pressure Testing Types

Hydrostatic pressure testing requires a pipeline to be exposed to water pressure levels above its normal operating pressure to determine whether there are any faults or weaknesses. This pressure test needs to take place in every new pipeline and all new sections of pipework laid in an existing system.

If not undertaken safely and correctly, in line with industry best practice, a pressure test can be a highly dangerous activity.

At Ant Hire Solutions, our end-to-end pipeline pressure testing solutions and expert advice ensure you have the right equipment to undertake the correct type of pressure test for the pipeline material and situation including polyethylene (PE), steel or ductile iron pipelines.

For all your hydrostatic pressure test needs contact our expert team on 0333 567 3210


These are designed for testing pipes made from Ductile Iron, Stainless Steel and Glass-Reinforced Plastic (GRP). The type 1 hydrostatic pressure test involves the measurement of volumes of water added (type 1a) to maintain the pressure over a test period, or volumes of water drawn off (type 1b) and measured after the system pressure has been replaced at the end of a test.

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Hydrostatic pressure testing is required for all new polyethylene (PE) pressure pipelines and for all new sections of pressure pipework laid in an existing system. The type 2 test accounts for possibilities of creep or legitimate water loss. Tests involve pipelines being brought up to STP and left for at least an hour. The pressure is then recorded and filtered through specially developed algorithms that can account for creep.

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The 10-minute test is used in situations where a very short test time is required. It is suitable for testing PVC pipes laid with the pipe busting-technique. The test maintains pressure for 10 minutes and the amount of water added is recorded to indicate the pressure changes in the pipeline. Joints in the tested pipeline are to be visually inspected for leakage during this time.
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Having the right equipment for the job is only part of the challenge of delivering safe and compliant pressure testing.

A well-prepared pipe provides the most comprehensive results in the shortest possible time. The removal of air, the speed of the ramp and generating sufficient pressure to create creep are also essential to a good test delivery.

We actively support contractors and operatives undertaking hydrostatic pipeline pressure testing to ensure they have the knowledge, skills and data to deliver safe and compliant tests, in as short a time as possible. Our intervention support services include:

  • Onboarding – we want our customers to have the skills and confidence to deliver right-first-time pressure tests, safely and efficiently. Our onboarding service provides on site test support and expert advice from our team to ensure best practice hydrostatic pressure testing delivery. To find out how our onboarding team can assist your team, contact us on 0333 567 3210.
  • Real-time test intervention – with our data logging technology, real-time performance analysis and expert intervention we can instantly relay vital test information to the operatives on site. This ensures issues with leakage and excess air content are responded to immediately, saving time, keeping people safe and helping ensure only leak-free pipelines enter the network
  • Training and knowledge sharing – our hydrostatic pressure testing CPD can be delivered onsite or remotely via webinar, reducing the need for people to travel to a single site. Contact our Customer Services Team to find out more.
  • Our pressure testing guide 'Experts guide to pipeline pressure testing. Get it right first time' is also available to download.

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