These type of cylinders are often required in household kitchens, commercial kitchens, restaurants, canteens, small industries, etc in multiple quantities connected in series for higher off-take where there is a higher consumption rate of LPG. Limitations of VOT Installations: Inadequate cylinder banks result in pressure drops in the VOT system throughout the year especially in peak hours or winter season. It is initially designed for the usage estimated and installed at the initial commencement of the project and subsequently more burners and equipment fired on LPG are added but the VOT cylinder bank remains the same.