Drain cleaners and maintainers. Document object identifier (doi): 10.3386/w23213. Take a look at some of the brands we work with. If you experience an unexpected plumbing problem…. Bellied pipework in bedfordshire. There’s no fixed rate for a boiler installation all kinds of factors could play into the cost, including where you live and whether you’re having a traditional or combi boiler installed, if it will run on gas or electricity, and potentially what brand.