Is it practical for a DIY to replace an old plastic cistern? The main problem I see is the holes of the new cistern potentially not matching up to the old ones and the need to drill holes into masonry. I saw a YouTube tutorial for the model I'm looking at and the one I currently have, he had to drill new holes for it to fit. I've had trouble drilling in other areas in the property with the wall material being unpredictable, anything from it crumbling, to empty spaces that aren't supposed to have any services behind them, to not being able to drill deep enough into the brickwork to install anything that will support a decent amount of weight. I'm also worried about water potentially leaking or running and ending up in the downstairs apartment during the installation or if something about the installation fails.
Should I also replace the bathroom water lines with flexi hose given the old ones are painted and flaking, it looks like they're copper which discolours anything it runs into? Should I also replace the loo tap and metal pipes which look like would be at least 50 years old and pretty scungey looking? They're going to stand out like a sore thumb when I've repainted the bathroom.
