The most common causes for a slow-draining toilet are: A clog in the drain line. A blockage between the tank and bowl. Poor or Clogged Venting.
A mineral remover and a wire hanger or paper clip can help clear out the buildup in the jet holes. Alternatively, you could also use a toilet brush with an under-rim lip brush. If that still doesn't solve the issue, then you may need to call a plumber to investigate.
A toilet that overflows and then drains completely is a sign of clogged rim jet holes.
Common causes of a slow-flushing toilet include low water levels, a partially clogged drain, mineral build-up on the jet holes, a defective flapper, and a blocked drain vent.
If water is rising in the bowl immediately after you've already flushed, that means a clog is blocking the water from moving through the toilet drain. If you flush again, there will be even more water that's unable to make it past the clog, and you'll end up with even more flooding from the toilet bowl.
If you're dealing with a toilet that won't flush, check to see if something is damaged or broken within the toilet cisterns like you would the fill valve if your toilet is running. Check your lift chain, flush valve, water valve, float ball, and more. If you cannot see anything, you may call a plumber.
Over time, flappers wear out, which allows water to continually drain from the tank. The result is not enough pressure released at flush to completely empty the contents of your toilet bowl. You can fix this problem by replacing the flapper. It is easy to do with any standard flapper purchased from a hardware store.
There is only one Drano® product recommended for use in slow-running toilets: Drano® Max Build-Up Remover. It contains microorganisms that break down organic matter in pipes that can slow water flow.
Pour Hot Water into the Toilet
If you need to heat some in the microwave or the stovetop, you don't want it to reach boiling temperatures. Boiling water can cause toilet porcelain to crack. Allow the hot fluid to sit in the toilet for a few minutes to loosen the clog.
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.
DON'T use a brick to save water in your tank.
If your toilet is older and you want to save water, we recommend filling a water bottle with sand or small rocks and using that to displace some of the water. Bricks can break down and clog your pipes.
Pour in Some Hot (But Not Boiling) Water
You can turn the tap in your bathroom sink or tub to the hottest setting or heat the water up a bit on the stove, but don't let the water get to boiling point. Pour it down the drain and let it sit for a few minutes to see if it loosens the clog.
Make your own drain cleaner by pouring one cup of baking soda and two cups of vinegar into the toilet and adding a half gallon of hot water. Dish soap can also help loosen some obstructions.
If the clog still seems to be intact, start over at step 1 and repeat the process a couple of times. For extra-stubborn clogs, you can let the fizz mixture sit overnight or combine this method with plunging.
Hydrogen Peroxide – Mix 1 cup of hydrogen peroxide and 1 quart of water. Pour this mixture down your clogged drain and let it sit for 20-30 minutes. Be especially careful as this chemical can cause burns.
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.
Whether it's for removing stains or clearing drains, baking soda is a must-have. To unblock your toilet with baking soda, mix it with white vinegar and water to start a chemical reaction and create a powerful, natural cleaning agent.
High Water Pressure with Baking Soda and Vinegar
To do this, use a 2:1 ratio of vinegar to baking soda, and mix it into 60 gallons of water. As you pour the water down the drain, use a drain snake or plunger to dislodge debris that is blocking water flow.
It is Extremely Corrosive For Your Drains
When your pipes are clogged, Drano will sit on top of the clog, continually reacting and generating heat until the clog dissolves. This can put a great deal of stress on your drains as the heat can cause PVC pipes to soften and even break or collapse.