With the development of the STOPPLE® Train plugging system, TDW has answered the industry's need for advanced safety in high pressure applications. A true innovation in plugging technology, the STOPPLE® Train system allows two plugging heads to be inserted through a single fitting. When the void between the heads is bled down, the seal on the secondary head provides double block and bleed pressures up to 1,480 psi. This revolutionary design helps reduce fitting costs, welding time, potential leak paths and safety concerns associated with pressurized piping systems.