Crossword clues for the word: SEPTICTANK The word SEPTICTANK has appeared as an answer to at least 4 crossword clues on different crossword puzzles. Crossword clues for SEPTICTANK Showing 1 to 4 of 4 results Clue(s) "The grass is always greener over this, for Erma Bombeck" Rural underground container Sewage-disposal container (with a season opener) Thirty days with one leading correspondent on military vehicle from rural waste disposal unit