Sign up to get the latest promotions, new releases and freebies! Radiator keys and carbon monoxide detectors can be found in most diy or hardware stores a radiator key usually costs around £ a carbon monoxide detector typically costs between £-. No one knows the local conditions and industry best practices better than our plumbers. In january , as alaska was receiving its statehood, central plumbing & heating, inc was getting its start in an old army surplus.