... the regulation of building water supply, fire water tank, storage tank, heating system expansion tank condensation, construction, road construction, geological survey, and ... than 700 mm channel between the cabinet and the wall, tank top and bottom not less than 500 ho meters.2. Buttress ... width 300mm, spacing 1000mm, height not less than 500mm, tank top and the roof is not less than 600mm, for easy ...