Our fixed installation stove allows more gas to pass through to the burner. Both 160K and 120K numbers are our actual measurement data points. We don’t have more photos than that available from our web site. Usually fixed installation is for serious customer who need to meet local code requirement by hiring a licensed plumber (~$200/Hr rate) and proper code compliance hose. For regular home cooking, most people should find 120KBTU one is quite sufficient. The black pipe on our stove is 1/2″.