Pour One Cup of Bleach Down the Drain Line It will kill any bacteria or mold present in your drain line, just like vinegar will. Pour one cup of bleach down your drain line every month to help keep it free from clogs. One cup of bleach is the cheapest and easiest way to unclog the drain line in your AC.
Using Bleach in Your AC Drain
Be sure to use a minimum of 2 cups once or twice per year. Be advised, however, that some newer units no longer recommend bleach or vinegar due to oxidation/degradation concerns. In these cases, boiling water is recommended.
You can use a cloth or stiff brush. Then, remove the plug or cap from the access point (the T-shaped vent) and slowly pour either 1 cup of distilled vinegar or 1 cup of bleach solution into the drain line. Wait for 10 minutes to 1 hour for the blockage to be dissolved, depending on the severity of the clog.
In addition, spilling bleach can ruin your carpet or clothing, whereas vinegar does not harm; it just leaves an odor. Pouring just one cap full of vinegar down your AC drain can kill mold, bacteria, and algae growth. Thus, vinegar remains a safe yet effective cleaning agent here.
Water and Dish Soap
Use a mixture of both to clean your AC drain line. The dish soap will help to break down the dirt and debris, while the water will flush it away. To use this method, mix a quart of water and a teaspoon of dish soap. Next, pour the mixture into the drain line and allow it to sit for several hours.
Drain Line Material
Chlorine bleach can quickly eat away at not only the line but the glue and cement joining the line to the fittings and the condensation pan. If your drain line is PVC, stick to white distilled vinegar for clearing clogs and debris, particularly during winter.
Add ¼ cup of distilled vinegar to the drain line through the opening where the cap was removed. It's recommended you use regular distilled white vinegar, as the increased acidity boosts its cleaning properties. If you find the smell of vinegar foul, you can also use peroxide or hot water and a dash of dish soap.
Pour One Cup of Bleach Down the Drain Line
It will kill any bacteria or mold present in your drain line, just like vinegar will. Pour one cup of bleach down your drain line every month to help keep it free from clogs. One cup of bleach is the cheapest and easiest way to unclog the drain line in your AC.
Bleach is a common cleaner found in most homes, but is it safe to use in homes with PVC piping? In short, yes. You can safely use bleach to clean and disinfect your PVC pipes, as long as you dilute it first and avoid mixing it with other chemicals.
Repeating the vinegar cleaning process once every month will keep your AC drain line in great condition. The cleaning process is exceptionally effective at removing unwanted bacteria and fungi, allowing your AC to run efficiently.
While it's often recommended that homeowners use a bleach solution to flush out a clogged drain line, this could be detrimental. Bleach contains chemicals that corrode metal. As the drain line access point is close to your unit's evaporator coil, any spillage or backflow can cause your evaporator coil to corrode.
Clean your AC drain line every one to three months, depending on its tendency to clog. For example, if you live in a particularly humid area that's prone to algae and mold growth, have an old home, or have several furry pets, clean your AC drain line as often as once a month.
To unclog an AC drain line, turn off the power to the unit. Locate the drain line and use a wet/dry vacuum to suck out the clog. Flush the line with water using a garden hose or cup of water. Check and clean the drain pan under the indoor unit.
Symptoms of a clogged air conditioner drain line
Water damage near the indoor unit, including rust on the bottom of the unit. Musty smell when the AC is running. Heat pump/AC not cooling house. Heat pump/AC not turning on.
1 Run cold water for 15 seconds into the drain. 2 Prepare a 20% solution of liquid chlorine bleach by adding 1 cup of laundry bleach to 4 cups of water. Caution: Bleach may cause eye damage, skin irritation, and may damage clothing. 3 Pour the 20% liquid chlorine bleach mixture down the drain.
Vinegar or hydrogen peroxide
This can help break down the clog, making it easier to pass on its own. After the 30 minutes is up, flush the drain with water to ensure everything is flowing as it should.
If you wanted to, you could flush it through with a little warm water to help maybe flush some of that algae out, but pretty much, you're good to go. All right, so in summary, don't use bleach; use vinegar. That helps with any mildew growth—keeps you running clean.
If you find you need to get rid of bleach, disposing of it properly is important. To dispose of bleach safely, it should be diluted with water and poured down the drain with the faucet running. Alternatively, follow local waste management guidelines for hazardous materials.
Before being used in plumbing, pipe goes through “thermosetting,” a hardening process that allows PVC to stand up to harsh chemicals. One chemical in particular to which PVC is resistant is sodium hypochlorite, more commonly known as bleach.
Dissolves Buildup: The acidic nature of vinegar helps dissolve accumulated debris and gunk in the drain lines, keeping them clear. Antimicrobial Properties: Vinegar kills mold and bacteria, eliminating foul odors that can emanate from your AC system.
AutoZone carries an AC flush tool in their Loan-A-Tool program, part number 57377. This tool allows you to fill AC flush solution into the bottle, and then use compressed air to blast this solution through the AC components, flushing any debris out.
Pour a Cleaning Agent into the Cleanout
While holding the funnel steady, carefully pour two quarts of laundry bleach into the funnel and allow it to find its way into the drain line. If the bleach begins gurgling or doesn't drain quickly, then pause and wait for a few seconds.
Before you panic, rest assured that white slime isn't uncommon. It's a biofilm composed mainly of bacteria called Zooglea. Zooglea forms a protective layer around itself, thriving in the dark, damp environment of your AC's drain pan.