The plus 3 double-wall tank for maximum safety
 The DWT plus 3 is sealed tightly using Roth's steel melt press process. A leak probe allows the safety monitoring of the space between the tanks. The leak-monitored metal casing means that the DWT plus 3 is truly double-walled all around. The PE inner tank and the steel outer tank, which is sealed all around, are tightly and firmly connected in the area of the tank nozzles. The TÜV has confirmed the DWT plus 3 quality based on the steel melt press process. The unique DWT plus 3 quality features stand for the highest level of safety!
 Our tanks are as fireproof as possible and have successfully passed a 90-minute fire test at the Dortmund Materials Testing Institute due to their steel encapsulation. Therefore, the Roth DWT plus 3 offers a safety time three times longer than pure plastic tanks.
 Permanent odor absorption due to the all-round, tightly sealed metal encapsulation. Steel guarantees absolute diffusion protection due to its material properties.