Hello erveyone, does anyone know what those 2 write plug on my furnace room floor? I have floor drain at the back of the frunace, I want to build a laundry sink close the side wall, I am not sure what is underground main pipe direction. my guessing toward the electrical panel is go to city sewer, so other side after another write plug shoud be main pipe, then I can dig from there? if someone can answer my question I would be much appreciated.
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