Gas Let By Tightness Test - Viva Training Centre

The Gas Let by Test, how to perform it, how to confirm it and what action you take!

In this video, VIVA Training’s technical trainer, Pete takes a look at the Gas Let By Test as part of a tightness test.



The Gas Let by Test, How Important is it Really?

This video is aimed at experienced or conscientious engineers because you should all know how to do it but for whatever reason decide not to do it and what they could be missing.

What is a let by test and what is it for?

A let by test is to make sure that the PCB shuts off. If the PCB does not shut off it will invalidate your tightness test completely!

And we prove this in the video with a 60 second let by test.

There is actually a gas leak on this installation which been masked by the let by and we set this up to show our gas trainees how important let by testing is. Make sure that you always do your full let by stabilisation and tightness testing.

About Viva Training

We provide a range of gas engineering, heat pump and plumbing courses at our training academy in Halifax.

We provide certification for gas operatives throughout England via bespoke courses that match your needs. So whether you’re an engineer who has enrolled onto our ACS course to remain up to date with the latest changes in the industry, or are a complete novice who has joined our Managed Learning Programme to start your journey to becoming a gas safe registered engineer, we want to give you the insights, skills, knowledge, tools and techniques to help you truly thrive.


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