ʻO ka pāpale hope kahi mea i hoʻohana ʻia no ka uhi ʻana a me ka pale ʻana i nā paipu, nā ipu, a i ʻole nā mea hana, i hoʻohana mau ʻia i ka hana ʻenehana, ʻenehana kūkulu hale, a me nā ʻōnaehana pipeline. Hana ʻia nā pāpale hope me ka metala, plastic, rubber, a i ʻole nā mea i hoʻohui ʻia, me nā ʻano like ʻole a me nā nui e kūpono i nā pono paipu a i ʻole nā mea hana.