Every homeowner in Singapore has had that moment a tap won't stop dripping, the sink is draining slower than usual, or there's a faint damp patch spreading across the ceiling. The first instinct is almost always the same: search a quick video, grab a wrench, and try to sort it out yourself. Sometimes that works. Sometimes it turns a small leak into a much bigger, wetter problem. So how do you know when a DIY fix is genuinely fine, and when it's time to bring in local plumbers