We also specialize in boiler replacement and service, plumbing services for new homes, remodeling projects and additions. CPHH Experience Serving Seacoast and Southern New Hampshire Cochecho Plumbing and Hydronic Heating owner Kevin Coppinger and his staff have worked on countless projects in the New Hampshire and Southern Maine area. Over the years, they have developed an expertise in the most advanced hydronic heating and plumbing equipment and techniques. This expertise can go. Cochecho Plumbing and Hydronic Heating designs and installs custom Hydronic and Radiant floor heating systems in the the Seacoast and New Hampshire (NH) area and beyond.