So, if I diy my boiler install and follow the MI,s to the letter and the boiler turns out to be faulty ,then the manufacturer will have to fix the fault ,replace the boiler or give me a refund and no need for the dog.
Or will the dog start barking ??.
if the MI'S state it must be fitted by an rgi no
however if it states a "competent person" and you can prove competency
you have ****ed it but proving it is a grey area