Common signs of a blocked drain include slow-draining sinks, gurgling noises, unpleasant smells, and water backing up in toilets or showers. If you notice any of these, it’s best to contact a professional service in Hatfield promptly to prevent further damage. https://www.vantageplumbingandheating.co.uk/effective-solutions-for-drain-repairs-in-hatfield-for-a-trouble-free-home/