Allow to work for 15 minutes for tough problems, allow 30 minutes. Your technician just finished up, so glad i found your company, great work and great people!”. Call 877-510-4860 to reach a plumber near you 24 hour emergency plumbers. Kennedy tank’s field services division has over 50 years of industrial. When a hot-water tap is opened, cold water enters the tank through the dip tube and the drop.