4. Ka wai a me ka wai ʻino:

- Nā Paipu Wai: Hoʻohana ʻia i nā ʻōnaehana wai kūloko a me ka ʻoihana.

- Hoʻoheheʻe wai a me nā paipu wai liʻiliʻi: Hoʻohana ʻia ma ke kūlanakauhale a me nā ʻōnaehana hoʻoheheʻe wai a me nā ʻōnaehana mālama.

5. Ka mana a me ka ikehu:

- Ka Hoʻouna Mana: Hoʻohana ʻia i nā ʻōnaehana pipeline no ka lawe ʻana i ka wai hoʻoluʻu, ka mahu, a me nā mea hana ʻē aʻe.

- Nā Mea Mana Mana: Hoʻohana ʻia i loko o nā paipu paila a me nā ʻōnaehana wela kiʻekiʻe, kiʻekiʻe i nā mea kanu mana.

6. Kaʻa a me ka halihali:

- Hana Hana: Hoʻohana ʻia i ka hana ʻana i nā chassis automotive, nā ʻōnaehana exhaust, a me nā mea hana ʻē aʻe.

- Kaʻaahi a me ka hana moku: Hana ʻia i ke kūkulu ʻana i nā kaʻa kaʻaahi a me nā moku no ka hoʻolālā ʻana a me ka lawe ʻana i ka paipu.

7. Mahiai a me ka wai.

- Pūnaehana Waiwai: Hoʻohana ʻia i nā ʻōnaehana hoʻoheheʻe wai no ka lawe wai.

- Nā Lako Mahiai: Hoʻohana ʻia i ka hana ʻana i nā mīkini mahiʻai a me nā lako.

8. Nā ʻōnaehana pale ahi:

- Nā paipu ahi ahi: hoʻohana ʻia i ka sprinkler ahi a me nā ʻōnaehana hoʻopau i nā hale a me nā ʻoihana ʻoihana.

9. Nā Pūnaehana HVAC (Heating, Ventilation, and Air Conditioning):

- Hoʻohana ʻia i nā ʻōnaehana HVAC no ka hoʻomehana ʻana, ka ea a me ka ea ma nā hale a me nā ʻoihana ʻoihana.

ʻO ka hoʻohana nui ʻana o nā paipu kila kalapona ma muli o ko lākou ʻano mechanical maikaʻi loa, maʻalahi o ka hana ʻana a me ka wili, a me ke kumu kūʻai haʻahaʻa. Inā hoʻohana ʻia i loko o ka ʻenekini kiʻekiʻe, ka wela wela a i ʻole nā ​​kūlana e koi ana i ka pale ʻana i ka corrosion, hāʻawi nā paipu kila kalapona i kahi hopena hilinaʻi.