As an experienced, family-owned commercial plumber, Diamond Plumbing & Heating provides a wide range of services to businesses in the Seattle, WA, area. Whether you’re looking for a commercial plumber to install a new plumbing system or a certified medical gas system installer for a dentist or hospital, our company has what it takes to get the job done swiftly and effectively. Our team is licensed, bonded, and union affiliated with Local 32 to provide our customers with peace of mind and the assurance that their projects will be completed using the best and safest techniques and equipment possible. We are also licensed under King County Small Contractors and Suppliers (SCS) License #1741, and Office of Minority and Women’s Business Enterprise as a Small Business Enterprise(SBE) Certificate #S000024345.