by Professor Green » Sat Jan 27, 2018 5:59 pm
I recall Mac saying it shouldn't be necessary but a vinegar run won't hurt, it'll make sure any left over nasties from the manufacturing process are safely removed and give you a good opportunity to test for any seals that don't seal etc.
You will want to give the copper mesh (if you're using it) a jolly good clean first otherwise you will end up with oil in your output and your boiler.
Cheers,
Prof. Green.