GF Piping Systems has introduced the Double-See Double Containment Vinyl Piping System in response to market demand for an improved pressure-rated double containment system for transporting hazardous liquids. The new system offers a simplified installation method, a patented closure coupling design that allows conformance to the ASME B31.3 test inspection requirements, and a unique-to-the-market 3-D thermal expansion compensation feature. GF’s Double-See Piping System offers versatile installation options, assembled and tested fittings and a unique pipe cut-length guidance system, which provides a truly simplified approach to installation. The piping systems are available with a complete selection of pipe, fittings, leak detection and access tees, closure couplings and termination fittings. In addition, an innovative valve-in-valve design allows full containment pressure rating.