Mike and i are still in love with our bathrooms — and would recommend avon plumbing without hesitation! Combination boilers are the uk’s most popular type of boilers for both. Is a plumber required to be insured and bonded? Finally, keep your purchase and maintenance records, including the boiler serial number, in a safe place in case you need to have the boiler repaired. We’re professional looking dudes and we keep your home clean when we’re in it! We’ll go above and beyond to protect.