H
happyflyer
manufacturers own engineers just change parts alot of the time, they can do do without extra cost tho as they have the parts on the van. Same with BG engineers to some degree. best find a good local engineer, no need to give money to greedy corps, especially thoses who's engineers are there to sell you a powerflush for a stupid price.
That's what I said go find a good local engineer, that might be more difficult than you think and who's the judge on how good is good, surely not the customer, BG like you say have all the parts, in the depths of winter you don't want someone learning his trade at your expense whist you freeze waiting for antother part you guessed wrong, I agree if BG are trying to sell on the back they have a toe in the door then it is wrong. What can we do about it, we had a difference of opinion about TBOE rad connection giving 2% more output, hells what different is crap going to make in the bottom of a rad, 2, 5, 10% what a selling point.
If BG said to my old aunt who is dead now, if you flush your rads out you will save 10% on energy, she would say do all 10 then, cost me nowt then..