No other secondary containment system has ever offered the ability to completely install the primary pipework system and execute integrity testing before closing the secondary system. With Gemini three secondary fittings, which are specifically designed to enclose standard one-piece primary fittings, allow you to reduce the number of necessary parts, welds, time and overall cost. Gemini allows Franklin Fueling Systems to provide up to 50% reduction in primary and secondary fittings and up to 50% reduction in fusion weld operations.