Installers investigate gas shutoff placements, drip legs, and unions for trustworthy protection entry and preserve

https://www.mediafire.com/file/2anlws76gfdvtqd/pdf-83385-94339.pdf/file

Installers ensure gasoline shutoff placements, drip legs, and unions for nontoxic preservation get admission to and nontoxic, leak-loose furnace operation through the years.