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 thanks to the new 1 ½" 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 1" for the United States market. The SMARTFLEX double wall system prevents accidental spills of dangerous fluids that are dangerous for the environment. Double wall electro-fusion 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 them to have a continuous interstitial space that can be monitored. The interstitial space can be accessed through termination fittings equipped with special quick connection valves compatible with pneumatic components that are available on the market. SMARTFLEX is the complete system of HDPE pipes for the transport of fuels and fittings 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 the needs of which it was conceived, developed, implemented and successfully launched on the market.