Check out our tool selection guide or chat with a drain brain! Blitz sink and drain unblocker/opener. Why choose a worcester accredited installer? You can develop your skills by taking further training in areas such as heating, ventilation and air-conditioning, and renewable energy technologies like solar powered heating. What pre-hire questions should be posed to a plumber? London's leading hour boiler repair specialists we are open for business hours a day so why not get in.