does it matter which one I turn first or which way since youtube seems to suggest this? Even though I've found nothing that looks like mine I want to be cautious!
Had a Baxi duo-tec combi 28 HE fitted a couple of weeks ago & the pressure has dropped so the hot water is freezing & no heating! Absolutely nothing in the instruction manual, the how to videos on the Baxi website or videos on Youtube is useful as none of them look like what's under the boiler...