No formal qualifications needed. Gain access to thousands of additional definitions and advanced search features—ad free! Mon – fri: 8 am – 5 pm, sat: 8 am – 12 pm. In general, this is usually a more common issue when the boiler gets to be 6 years or older. At hanson's plumbing & heating, our customers come first we are a full-service heating, cooling, and plumbing company that has been family-owned and operated since.