Tulloch PriestCo-founder, Gas Engineer Software · Co-founder of Gas Engineer Software

Don't use the old tightness test method after October or you'll be defected

5 May 2026 · 0 min

Watch on YouTube

0:22

The IGM UP1B Edition 4 update changed how tightness testing works. From October 1st, GasSafe inspections require the new method or you'll be marked defective for non-compliance.

This IGM UP1B Edition 4 change has come into effect already. If you don't know it and you have a GasSafe inspection, then you will be defected on the fact that you don't know it. But it's, there's basically a transition period between the old way of doing tightness testing and the new way. So as of the 1st of October, you'll be expected to use the new, the new way, new procedure for tightness testing.

More from Tulloch

20:35

Your Profit Is More Than Your Salary: Pricing A Trades Business w/ Doug D'Aubrey

1mo ago

0:42

Is taking over another gas business a realistic alternative to hiring from scratch?

1mo ago

0:26

The thing Dan still struggles with now he has engineers working for him

1mo ago

0:51

Taking over a customer base doesn't mean you keep every customer

1mo ago

0:39

You've spent years building a customer base and it’s worth a lot of £££

1mo ago

0:30

The thing most engineers don't prepare for when taking over a business

1mo ago

0:29

At some point you either grow or stop saying yes to new customers

1mo ago

24:02

He Took Over Another Gas Business After 3 Years As A Sole Trader w/ Dan Giles

1mo ago

39:03

How Networking Will Transform Your Trades Business w/ Michele Ibbs

1mo ago

2:45

Some Gas Engineers Are Still Charging Rates from 20 Years Ago

1mo ago

0:29

What someone from the motor industry noticed when they joined the trades

1mo ago

See all content