| Clue | Source | Date |
|---|---|---|
| Drainpipe parts | Commuter | 09 Jul 2025 |
| Letter-shaped sink pipes | Commuter | 18 Jul 2024 |
| They're found beneath sink holes | New York Times | 28 May 2023 |
| Letter-shaped sink pipes | Universal | 23 Aug 2019 |
| Letter-shaped sink pipes | ||
| Drainpipe curves | ||
| Drainpipe curves |