GNWI Corp. is a water heater installation, plumbing repair, and maintenance company located in Vancouver, WA. We offer but are not limited to plumbing repair and maintenance, water heater installation, repair, and maintenance, household appliance installation, and gas piping install and repair. The Great Northwest team is professional, knowledgable and has over 20 years of combined experience in the industry. Our goal is to treat our customers like family and provide quality service. Contact us today to find out more about our federal contracting abilities and to see how we can best serve you.