Knowledge Hub

Insight

What 2026’s regulation changes mean for retrofits

The proposed amendments to Schedule 2 and how they affect existing Category 4 installations.

The proposed amendments to Schedule 2 and how they affect existing Category 4 installations.

Existing Category 4 mechanical protection stays legal only if it still matches the amended Schedule 2 table. Audit filling loops and HU outlets before 2026.

Relevant applications

Related Regulation Guides

Related Tools

Share this article

  • Copy link
  • Download PDF
  • Email article

Continue reading

Related articles

View all 6 Articles

Insight

Common RPZ installation failures we still see on site

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

Insight

Filling loops on non-house systems: RPZ or break tank?

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

Insight

Specifying air gaps on Category 5 washdown

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