Across
2. Spring a ____ 4. A slender, flexible auger used to dislodge clogs in 7. Ion removal system 10. Prevents flooding 12. A channel or pipe that carries off surplus liquid 13. A light blow 15. Cleanse 16. A small drop 18. One element in ancient and medieval philosophy 19. Stopped up 20. Collects human waste 21. A tool used to rotate plumbing pipes and fits |
Down
1. On-demand system 3. No-dig 5. Seals a gap 6. U-shaped portion of pipe designed to trap liquid or gas to 8. Carries waste underground 9. Controls the flow 11. Sealant in plumbing 14. Bendable network media 17. Regulator |