New fittings to complete the SMARTFLEX range of pipes and fittings for the transport of fuels and dangerous fluids. The entry boot range is enriched by the new diameter 50mm item code 19SEBEPN50. Entry boots ensure the correct entry of pipes into the sumps placed over tanks or under dispensers. They provide a perfect leak tightness. Another novelty is the double wall range diameter 32mm for the United States market. The SMARTFLEX double wall system prevents accidental spills of dangerous fluids that are harmful for the environment. Double wall electrofusion fittings are manufactured using NUPI proprietary procedures and technologies and are the most innovative products of their kind available on the market. SMARTFLEX double wall electrofusion fittings are entirely coaxial, therefore allowing for a continuous interstitial space that can be constantly monitored. The interstitial space can be accessed through termination fittings equipped with special quick connection valves compatible with pneumatic components available on the market. SMARTFLEX is the complete system of pipes for the transport of fuels and fittings in PEAD at road and motorway service stations, airports and marinas. A complete range already used and approved by the main oil companies all over the world, in response to whose needs it was conceived, developed, implemented and successfully launched on the market.