{"id":19428,"date":"2026-06-10T08:59:12","date_gmt":"2026-06-10T08:59:12","guid":{"rendered":"https:\/\/tradefoxapp.com\/?p=19428"},"modified":"2026-06-10T10:31:49","modified_gmt":"2026-06-10T10:31:49","slug":"airlock-in-pipes","status":"publish","type":"post","link":"https:\/\/tradefoxapp.com\/fr\/airlock-in-pipes\/","title":{"rendered":"Airlock In Pipes: How To Diagnose, Hose-Bleed Methods & Why Combi Systems Get Them"},"content":{"rendered":"
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An airlock in pipes is one of the most common faults engineers get called out to, and one of the most frequently misdiagnosed. A trapped pocket of air in a pressurised or gravity-fed system can mimic the symptoms of a failing pump, a scaled heat exchanger, or partially blocked pipework. The result is misdirected repairs, unnecessary parts fitted, and a customer paying twice.<\/span><\/p>

This guide covers structured diagnosis, the regulation-compliant approach to hose-bleeding, the reasons combination boilers are particularly prone to trapped air, and the standards that apply on every job. <\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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What An Airlock Actually Is\n<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Trapped air sits at a high point in the pipework, or at a low-velocity section, and cannot be displaced by the system’s working pressure. In gravity-fed systems, even a small bubble at the top of a riser can stop flow entirely because the static head either side of the bubble is too low to push it through.<\/span><\/p>

In sealed pressurised systems running at 1.0 to 1.5 bar, the picture changes. You see:<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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