Installers ascertain gas shutoff placements, drip legs, and unions for protected repairs get right of entry to and safeguard
http://www.mediafire.com/file/r4lrffsnjc3fsl3/pdf-70717-992.pdf
Installers confirm gasoline shutoff placements, drip legs, and unions for nontoxic repairs get right of entry to and comfy, leak-free furnace operation over the years.