Interested in becoming an alpha installer? The table below compares the top baxi system boilers that we recommend, including price. Pop (you might call it soda), particularly coca-cola and pepsi, is excellent for beating a clog it's arguably better than commercial chemical clog remover! Build-up of fat, grease, or detergent in stroud drains. Let’s face it, your boiler isn’t the most glamorous piece of domestic equipment in your home; but it’s certainly one of the most important!.