Insight

Common RPZ installation failures we still see on site

Missing test cocks, inverted relief valves, and isolation that makes annual AIM testing impossible.

If the tester cannot isolate, drain and fit gauges, the installation is not AIM-compliant. Relief valves discharge down; test cocks stay accessible.

Relevant applications

Leisure

Related Regulation Guides

Related Tools

Share this article

Insight

Missing test cocks, inverted relief valves, and isolation that makes annual AIM testing impossible.

Insight

Closed heating and chilled circuits are Category 4. A double check on the filling point is not enough.

Insight

When a mechanical device cannot replace a Type A air gap — and how to dimension the weir.