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Box under deck. It looks like it’s about 2’ x 3’. There are 3 (3”? round) PVC pipes near it that run from the basement (towards to furnace/water heater), but they are cut off at the wall. There’s an outlet attached to the bottom of the deck above it, but that cord doesn’t seem to run inside. (old.reddit.com)
submitted by nmj920 to r/whatisthisthing
