You can stop your own toilet from overflowing and prevent a flooding emergency.
Second tutorial video for Stopcocks Women Plumbers by Hattie Hasan author of The Joy of Plumbing; a guide to living the life you really really want (http://joyofplumbing.co.uk), shows how to stop your toilet overflowing by adjusting a WC ball valve, from turning off the water to adding the finishing touches. Many more tutorials to come in this series of short films made to compliment your knowledge.