Best for pushing and pulling clogs loose on the cheap. Newer bellows-style models are more effective. Won’t mar metal or porcelain surfaces.

But require physical strength and may be difficult to seal against some drains.

Price $5 to $8.

Best for blowing plugs of built-up food particles down the line with a burst of compressed gas.

But mating the cap to the drain can be tricky and may require an adapter. Devices have a tendency to splash back. Can be used only a limited number of times before a replacement is required.

Price $5 to $30.

Best for dislodging stubborn clogs located far down the line. The balloon-like body wedges into place inside a pipe, then floods it with water, building pressure until the clog is freed.

But must be connected to a hose, which may be inconvenient, or used with a faucet adapter. You should also consider using a quality backflow-prevention valve or device to prevent any possibility of contaminating your potable-water supply.

Price $9 to $20.

Best for penetrating clogs. Short, spiny models fish hair from just below a sink’s strainer; longer metal versions can reach into the main drain. Auto-feed models are more expensive but easier to use.

But some have ­limited range and require the removal of the sink trap.

Price $3 to $130.

Best for clearing organic-based clogs like grease, hair, and soap without using toxic chemicals. Won’t damage septic systems.

But can take 24 hours or more to work and are ineffective on mineral deposits.

Price $5 to $9.

Best for improving minor clogs. Easy to use.

But are only moderately effective at best. Require 30 minutes or more to work. Can damage septic systems and discolor surfaces.

Price $3 to $7.

Best for effectively clearing undersink clogs chemically.

But extremely hazardous. Need careful mixing. Generate heat and can produce caustic gas, especially in the presence of aluminum. Can damage garbage disposers and septic systems and discolor surfaces.

Price $5 to $8.