4 step sequence:
1. 2 quarts boiling water down the sink or tub drain. Boiling: 220 deg. F., not just hot. Softens up the clog. Then add
2. 2 cups (16 ounces) Drano (gel or liquid, commercial drain opener). Wait one full hour to let it work. Then add
3. 2 cups (16 ounces) bleach down the drain. 'Double whammy'! Wait another hour for that brew to work. Then, finally, pour another
4. 2 quarts boiling water down the drain. Flush well after that.
This has worked twice now for...