Hoʻohana nui ʻia ka kiwikā puka pahi ma nā kūlana haʻahaʻa haʻahaʻa e like me ka pulp a me ka pepa, ka lanahu, ka ʻoihana kemika a me ka ʻoihana meaʻai. Hiki iā NSEN ke hāʻawi i kahi hoʻokahi-directional, bi-directional, metal seated, resilient seated a me ke ʻano through conduit. Welina mai e hoʻokaʻaʻike mai iā mākou e kiʻi i ka hāʻawi a hoʻopilikino paha i ka kiwikā no kāu papahana.