Why choose a worcester accredited installer? All the forum's best tips go in. Is your boiler losing pressure? You can be reassured that with sse boiler or heating cover you’ll benefit from unlimited parts and labour, an annual service worth £, and unlimited / emergency call outs take a look below to find the right product for you. Our technicians are highly trained and experts in hvac service and replacements we guarantee to do the job right the first time! Acid-based drain cleaner and alkaline drain.