Why use ahp boiler services for all your boiler and central heating needs? Did you know you can unblock an outside drain using caustic soda? well, you can – and here’s how to do it. Watch out for frozen pipes this winter! As accredited installers for worcester bosch, ideal and atag our helpful team of boiler engineers and experts can advise whether your existing boiler needs repairing, or whether a new boiler installation might be a more suitable option we have years of experience.