Whether it’s fixing a dripping tap or adding a new bathroom, it is always best to ensure whoever you employ to undertake the work is qualified and experienced to do so. You may feel that you could probably have a go at changing tap washers yourself, but do you know where to turn the water off, and are you using the correct materials? Unless you are entirely confident that you can safely undertake the work yourself, it is strongly recommended that you hire a qualified professional to ensure proper fittings are used and to protect the quality of your water supply.