If the clog did not clear by using the plunger, the next step is to try an auger designed for sink and waste lines such as a sink auger, (also drum or canister auger) or a plumbing snake. Of these, the sink auger is preferred for its clean ease of use and convenience. For less than $20, it's a handy tool for all drains except the toilet.
- With the lavatory sink stopper removed, extend the auger cable into the drain. When you feel it against the clog, pull out about 12 inches more of the cable and tighten the set screw.
- Turn the crank handle of the auger with firm but gentle pressure.
- Extend more cable as required until you feel you've worked through the clog. This should work if the clog is in the trap.
- Repeat and then flush with hot water from the faucet once the drain starts to flow.
- If you have extended more cable than the distance through the trap, then the clog is beyond the trap, probably in the vertical vent stack in the wall to which the drain is attached. To get at the vent stack, see the next step as it involves removing the waste trap.
