Can the high-level fire water tank be installed on the roof without valve lock?

You can't. When the high-level fire water tank is installed on the roof of inaccessible personnel, there must be safety measures such as hot-dip galvanized steel plate, reinforced concrete and stainless steel plate. There is no need to add a valve lock, which will lead to misoperation. As the name implies, the high-level fire-fighting water tank is to set the fire-fighting water tank at the highest part of the building, and use the potential difference to provide the water pressure required by the fire-fighting system in the quasi-working state, so as to keep the water filled in the pipeline at a certain pressure.