Coupling up a toilet has absolutely no relevance whatsover to gas appliances and should not qualify as a shortcut into a couple of week gas qualification for the next generation of hopeless incompetents.
And it has no relevance. Only GAS qualifications are counted, or quals with a significant gas content.
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ACS is certainly outdated and has plenty wrong with it, but I don't think the main problem is lack of training and experience.
ACS only establishes that a person has knowledge of a list of things, before he leaves with a Pass. I reckon that anyone who's been through it OUGHT to be
safe. There
is enough in it for that. If you don't agree, tell me what's missing.
In my view the problem (which leads to shoddy work being done) is based around two thing which training, and working with someone else for aeons, can do nothing about.
1) People are lazy. Even when they know what to do they'll look for a short cut to getting finished. They can't be bothered to look up how to adjust a gas valve. They can't be bothered to do all their tightness tests.
2) Too many people who do gas stuff, are thick. They might look something up, but can't understand, or implement, what they find. They all might know that too little air leads to a yellow flame, but show them a hob burner roaring away with half its GAS ports blocked, and they'll say not enough air.
What's the answer? Dunno. Beats me!