Long Business Description When it comes to plumbing, fire protection, site utilities and mechanical work, Monona Plumbing & Fire Protection has been a trusted professional contractor for 38 years. Our customers benefit from an experienced network of estimators, project managers and field service technicians that have the experience, knowledge and passion to exceed your expectations. As a full-scope contractor Monona Plumbing & Fire Protection has the ability to manage your project professionally from design, to installation and service.