Can some pipes not handle Drano?
Single Use, Not Frequent Use
Because of the chemicals found in these types of products, you could cause irreparable damage to your pipes. In most cases, a single use of Liquid-Plumr or Drano will not cause any issues with your pipes, though you should avoid using them in your toilet.
Drano is not effective on every type of clog and can also be very damaging to your plumbing system. The heat generated by chemical reactions is much more than your drains can handle. Older plumbing can easily be damaged and corroded. The glue that holds them together can break down and split pipes.
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.
Because vinegar is an acid and baking soda is a base, mixing the two will cause a chemical reaction that will create pressure and possibly dislodge the clog. For this method, pour a half-cup of baking soda down the drain, followed by a half-cup of white vinegar and, then, plenty of hot water.
Because of its corrosive nature, Drano can cause toilet bowls to crack, PVC pipes to melt or break and the glue that holds pipes together can be eaten away. If any of these things happen, you're going to be left with an inoperable plumbing system and costly repairs.
This may happen when a partially dissolved clog gets lodged further down the pipe. We recommend trying another bottle of this product. However, if the problem continues to persist, you should call a plumber, as there are some plumbing situations that even Liquid-Plumr cannot fix.
After 15 to 30 minutes, clogs are substantially minimized or dissolved. A final blast of hot water flushes away what's left of the clog.
A plumber inserts the hose and nozzle into your pipes and blasts high-pressure water through it to scour out the drain pipes. Not only does this move out clogs, but it also helps to remove hard deposits and hard water minerals. This is one of the most popular and safe ways of unclogging and cleaning out drains.
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.
Drano® Liquid Drain Cleaner starts working to unclog your drain on contact. After 15 to 30 minutes, clogs are substantially minimized or dissolved. A final blast of hot water flushes away what's left of the clog.
What works better than Drano?
This mixture is a great green alternative to Drano because most people have these items somewhere in their kitchen. To use this method, pour half a cup of baking soda into the clogged drain and follow it with a half cup of white vinegar.
STUCK IN THIRD. Clogs can also be caused by buildup in the third, lateral section of the pipe. Drano® Max Gel Clog Remover is effective on these clog types as well. Keep some on hand for its reliable clog-busting power!

No matter what the conditions of your drains and pipes are, you shouldn't have a problem leaving Drano for an hour or two. In some cases, you may even be able to leave it overnight without issue.
Drano will continue to work even if left overnight, but this is not recommended. As we mentioned before, leaving Drano in the drain for too long can cause damage to your pipes. If you do need to leave Drano in the drain for an extended period, make sure to flush the drain with hot water regularly and reapply as needed.
While the phosphoric acid found in cola can help alleviate some minor clogs, carbonated beverages are certainly not the ideal drain cleaner. Better DIY methods include a baking soda/vinegar mixture, a plunger, or a plumber's snake.
Option #1: Baking Soda and Cider Vinegar
Baking soda is actually one of the most common alternative drain cleaners! It's also very effective for routine maintenance and doesn't take long at all to prepare. For the best effect, mix a cup of baking soda with a cup of cider vinegar. Pour it down the drain with hot water.
In a toilet, especially since Drano does not work quickly on toilet clogs, it creates a serious issue. The heat generated from this chemical reaction can crack the porcelain of the toilet or soften the PVC of the pipes. So, not only can Drano hurt you, but it can also hurt your toilet and cause costly damage.
HOW IT WORKS. The thick bleach formula in Drano® Max Gel Clog Remover cuts right through standing water, clinging to your toughest clogs to blast them fast. It works great to remove hair, soap scum, and other gunky clogs.
Attempting to force a clog through a toilet with a plunger can often make the problem worse. Instead, create a seal and slowly push down on the plunger before pulling it back sharply. The suction can help pull the clog back up toward the bowl, breaking the blockage and allowing gravity to take over.
Baking soda, vinegar and boiling water can help clean drains naturally, but you may need something stronger, like Liquid-Plumr, to fully unclog those really tough drain clogs.
Should I flush Drano with boiling water?
For clogged or slow-running drains, apply the product and let it work 15 minutes, then flush with hot water. For tough problems, allow 30 minutes before flushing.
Over time, the continued usage of Drano can lead your pipes to corrode, crack and eventually fail. Dangerous for your skin, eyes and lungs: Since Drano's purpose is to dissolve organic tissues, if Drano comes into contact with your bare skin, eyes, or mouth, it can cause rashes and even burns if left too long.
One flush once a month can help prevent septic backups!
Experts agree: Drano Max Gel is the best overall drain cleaner because it works quickly to get rid of tough clogs. This reliable and effective cleaner is a thick gel that goes deep in sinks, pipes, and drains to reach the source of the clog and completely dissolve it.
Homemade drain cleaner can break up even the toughest clogs in your sink. Baking soda, vinegar and Dawn dish soap along with boiling water can safely unclog a drain. Baking soda, vinegar and Dawn dish soap along with boiling water can safely unclog a drain.
Plumbers Say You Should Never Use Drano. Drain cleaners are a popular solution when homeowners notice a clogged drain. But it's also one of the most commonly misused products out there. Any plumber will advise against its use.
Drain Augers or Snakes
The standard drain cleaner tool plumbers use to demolish obstructions in pipes is a motorized drain auger, also known as a drain snake. An auger consists of a long, flexible coil of metal that works similar to a corkscrew. The end of the auger goes down the drain until it reaches the clog.
Baking Soda and White Vinegar
This mixture is a great green alternative to Drano because most people have these items somewhere in their kitchen. To use this method, pour half a cup of baking soda into the clogged drain and follow it with a half cup of white vinegar.
If using a plunger or drain snake does not clear your clog, this is a sign that it is time to call a professional plumber. Considering the risks that come with using Drano, hiring a plumber to clear the clog for you will still be the safer and cheaper option in the long run.