If your snaking session yields plenty of hair and soap scum, but still leaves you with a slow drain, there's a good chance that the P-trap is still obstructed.
Check the vent
Your plumbing system has a vent that allows air to flow through the pipes. If the vent is blocked, it can cause water to drain slowly. You can check the vent outside your house to make sure it's not blocked by leaves or other debris.
Fats, oils, and grease are such a common cause of slow draining sinks that plumbers nickname them — FOG. Resist the temptation to throw leftover cooking fat down the drain; it will harden and clog. Instead, pour carefully into an empty can, cool, and dispose of it in your regular garbage.
When you are using a baking soda and vinegar solution to clean out your drain, you are actually causing the rubber and plastic that are used for the drain's pipes to be eaten away by the mixture. Over time, this rubber and plastic will break down, causing the drain to become even more blocked.
Using a snake is also more invasive and time-consuming than using a chemical cleaner is, and can often become a dirty job. When it comes to getting at and removing major clogs or clogs that are deep down in your pipes, however, a plumber's snake is your best bet.
You can use Drano® Clog Removers to unclog a kitchen sink, bathroom sink, shower or clogged bathtub, but DO NOT use them in toilets. For clogged or slow-running drains, apply the product and let it work 15 minutes, then flush with hot water.
Best Overall
In just 15 minutes, our pick for the best drain cleaner, Drano Max Gel, will clear up clogs in sinks, tubs, PVC, septic tanks, and garbage disposals. It's safe for piping and septic systems, with a thick gel that sinks into standing water to the source of the clog.
Fixes for Low or No Water Pressure in Bathroom Sink
Remove and clean the faucet aerator thoroughly, or replace it with a new one. Remove and clean the flow restrictor, increase the size of the flow restrictor hole, or remove it entirely and replace the aerator without replacing the flow restrictor.
One way to unclog a pipe is to use a larger wire snake. These snakes are more powerful, longer, and often feature more aggressive tips for breaking the clog up or hooking it for removal. Simply feed the wire snake through the drain, and continue advancing it until the clog is clear.
Failure to tighten the thumbscrew is a common reason behind drain snakes that are not working. You must make sure that the thumbscrew that secures the cable inside the drum or handle is securely tightened. If it is not, the cable will not rotate at all when you twist the handle.
While snaking is generally considered safe for your pipes, it can damage your pipes if they are in bad shape. Homes that have older pipes are more susceptible to this happening as hairline cracks and corrosion occur over time. Surprisingly, snaking your main line can potentially make the clog worse.
Crank the Handle of the Drain Snake
When pushing the cable through the P-trap, the U-shaped pipe section under the sink, you may encounter some friction and resistance. If this happens, push on the cable while cranking the drain snake slowly. A couple of turns will help the cable maneuver through the bends in the pipe.
Pour or squeeze ½ cup of Dawn® dish detergent down the drain. For a tougher clog, use 1 full cup. Let the detergent work its way down the drain for 30 minutes.
You may be surprised to learn that pouring soda down the drain does work for some clogs. To be specific, you need a dark-colored cola (such as Coca-Cola or Pepsi). This type of carbonated beverage usually contains a good amount of phosphoric acid, which given enough time, can eat away at some types of clogs.
With time, baking soda and vinegar may work as a natural drain cleaner on weaker drain clogs, and the benefits of regular drain cleaning can help keep your drains free of clogs. But for tough drain clogs that need to be dissolved right away, you may want to use a stronger drain cleaner, like Liquid-Plumr.
Baking soda and vinegar may unclog your drain better than Drano ever could. Start by getting rid of the standing water in your drain. If it will go down slowly, just wait until it's gone. If it isn't moving, use a cup or a spoon to get it out of there.
When Drano won't go down the drain, grab a plunger instead. Many people think that these are only good for toilets. However, they can create suction that can dislodge your clog. If you're using a plunger, choose one that is suited for the type of clog you're dealing with.
The chemicals in Drano may not solve all clogs, and they can lead to a worsening of pipe issues. Drano can build up in a clogged area, and corrode the pipe. With repeated use, these chemicals may eat their way through a pipe, and cause a leak or a collapse of the system.
Why Plumbers Dislike Drano & Other Liquid Plumbers. One of the main reasons plumbers dislike liquid drain cleaners is that they can actually cause more harm than good. These products contain harsh chemicals that can corrode your pipes and cause damage over time.
Annually. Even if you don't notice any specific signs that your drains are having trouble with clogs, you should do your best to have them cleaned at least once every year.
Pouring boiling water is quite risky as it might lead to a steam burn or scalding. Another thing to keep in mind is what type of material you are pouring in into. If you have a porcelain sink, it is likely to crack due to the heat. All in all, pouring boiling water down your drain will only cause issues down the road.
Can you leave baking soda in the drain overnight? It is safe to leave baking soda (and vinegar) to work overnight to unclog a drain.