Keep up the great work hiring and training professionals who embody the holt way! If pipe (b) is blocked or faulty the water authority would normally be responsible for clearing any blockages and repairs. Great customer service! very trustworthy people!! From monday to friday from :am to :pm. There may come a time when the cost of having an old, faulty or inefficient boiler prompts the question: should i get a new boiler? A safe and effective.