The TankDrain is necessary and essential to prevent the floating roof from sinking in case of accumulation of water or snow on it.
The accumulated product gets into a drain-sump on the roof, then into a drain system and finally into a drain valve on the shell at the base of the tank to get out.
The floating roof drain systems are custom designed and engineered to suit your tank. These systems are 100% aromatic resistant and the materials are compatible with all kind of stored products.