G3 Qualified: Understanding Unvented Hot Water Principles for Plumbing Students

2025-12-21

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The Copper Connection Podcast – Season 2, Episode 31.Struggling to understand unvented hot water systems? In Episode 31 of The Copper Connection Podcast, host Chris Bailey breaks down everything plumbing students and apprentices need to know about unvented hot water principles—from G3 regulations to expansion vessels, relief valves, and fault diagnosis.Whether you're studying for your T Levels, City & Guilds, or NVQ in plumbing and heating, this episode will help you understand the key differences between vented and unvented systems, why water expansion mat...

The Copper Connection Podcast – Season 2, Episode 31.

Struggling to understand unvented hot water systems? In Episode 31 of The Copper Connection Podcast, host Chris Bailey breaks down everything plumbing students and apprentices need to know about unvented hot water principles—from G3 regulations to expansion vessels, relief valves, and fault diagnosis.

Whether you're studying for your T Levels, City & Guilds, or NVQ in plumbing and heating, this episode will help you understand the key differences between vented and unvented systems, why water expansion matters in sealed systems, and what safety devices are legally required under Approved Document G3 Schedule 2.

You'll learn:

✅ The principles of water under pressure and why expansion management is critical

✅ How expansion vessels, PRVs, TPRVs, and tundishes keep systems safe

✅ Common faults like dripping tundishes and how to diagnose them

✅ Why only G3-qualified engineers can install and service unvented systems

✅ Real-world tips to help you feel confident on site and in your exams

Perfect for plumbing apprentices, construction students, and anyone pursuing technical qualifications in the trades. This is practical, story-driven learning that actually sticks.

Follow The Copper Connection Podcast for weekly episodes packed with trade tips, exam revision, and career advice for the next generation of skilled tradespeople. Let's build your future—one episode at a time.