Tag Archives: plumbing repair

Why Does My Toilet Flush Slowly

Why Does My Toilet Flush Slowly
When a toilet flushes slowly there are really on two possible causes. The water is either slow going out through the trap way of the toilet bowl drain or, the water is too slow going from the tank to the bowl and the siphon of the water out the drain never occurs. The siphon is the process that rapidly clears the bowl and its contents with the gulping of air down the drain at the finish. When the water enters the bowl to slow the water just slowly runs through the toilet and doesn’t effectively remove the waste. Sometimes the waste just swirls around and only part of the waste leaves with each flush.

Siphon Flush

If you look at the side view of many toilet bowls you can see the outline of the trapway which sweeps up from the bowl then curves downward along the back of the bowl then continuing downward curves again towards the front of the bowl and goes out the outlet at the bottom between the two bolts that secure the bowl to the floor. The initial upward sweep and then the downward curve is what controls the water level in the bowl, and the trap way is a couple of inches in diameter. When the toilet is flushed a large volume of water should enter the bowl. Some toilets have a siphon jet which is a hole at the bottom of the bowl pointing into the trapway which water pours out of helping to push water into the trapway. The large volume of water should completely fill the trapway setting up a siphon, which sucks the water and waste out of the bowl ending with the air gulping into the trapway. If the water volume entering the trapway is insufficient to set up the siphon action the water just flows over the top of the trapway like water over a dam, this action is what results in the slow flush.

Bucket Test

When a toilet flushes slow, one of the first things you can do is the bucket test, which will test the function of the bowl. Get a pail and fill it with the amount of water that your toilet is designed to flush with. Quickly pour the water from the pail into the bowl, and see how the toilet flushes. If the toilet flushes poorly then you should suspect a clogged trapway and have the toilet augured to remove the clog. If the toilet flushes well then you know the flow of water from the tank to the bowl is the problem and you should direct your efforts in that direction.

How To Improve Flow From The Tank To The Bowl

When faced with a tank to bowl flow problem one of the first things I look at is if “in tank bowl cleaners” are being used. The bowl cleaners often clog the internal water passages of the toilet causing problems. I remove the bowl cleaner from the tank before doing anything else and in some cases this alone fixed the problem. I check the level of the water in the tank to make sure that the tank fills to the water level line on the tank or, the overflow tube. If there is no mark then 5/8” below the top of the overflow tube should be used. Check the flapper to make sure that it stays open long enough when flushing and does so consistently. Replace the flapper if there is any doubt. Make sure the fill valve has water going through the bowl refill tube attached to the overflow tube and the bowl is refilling to the proper level. Slowly pour water into the bowl to see if the water level in the bowl increases. If part of the water from the flush is devoted to filling the bowl to the proper level it can cause a weak flush. Finally take a piece of coat hanger wire into each of the holes under the rim of the toilet bowl and make sure that the siphon jet is clean as well. Frequently mineral deposits can clog the holes around the rim and the siphon jet causing water to flow slowly into the bowl. Checking these items on your toilet may restore good flushing to a slow flushing toilet. If these steps do not improve the flush then the toilet may require replacement.

Common Toilet problems/ Charlotte Plumbers Blog.


Are you experiencing issues with your toilet? If so, we hope you find this Toilet Troubleshooting guide useful. Please remember that it’s often more economical to call a Licensed Charlotte Plumber, like Charlotte Plumbing & Repair to troubleshoot and fix your plumbing issues. Our number is (704)394-5252, and we have technicians standing by, 24 hours a day, 7 days a week.

As folks retire for the evening to sleep, water pressure in municipal water systems begins to rise. This increase in stress can be transferred to a worn ball cock valve and trigger it to vibrate ever so slightly. This is the moaning you are hearing. Get a new valve.

Ghost Flushing

Does your toilet tank start to fill on its own? In other words, run for an extra five or 10 seconds? This is usually due to the following causes: poorly fitting/leaking flapper and/or a refill tube that is too long. A worn flapper or corroded flapper seat will trigger water to slowly drain from the tank into the toilet bowl. After an hour or two the water level drops enough and the fill valve kicks on. The same thing can happen if the water line that runs from the base of the fill valve to the inside of the overflow tube is simply too long. This may siphon water from the tank. New fill valves come with a special clip that holds the tip of the water line up and ensures that water will stay in the tank where it belongs.

Multiple Flushes

Do you flush your toilet and get two for the value of 1? If that’s the case, the water level within the tank could also be too high. Alter the float management on the fill valve and try to drop the water level in the bathroom tank one inch or so. Trial and error will let you get the water level correct.

Partial Flushes

You flush the toilet and get cheated. The flapper valve can get waterlogged over time and flop down too quickly. The chain that connects between the flapper valve and the flush handle could also be too tight. Adjust it one link at a time. The water level in the toilet tank could also be too low. Modify the fill valve so that extra water enters the tank. You may have a primary era low flush toilet. If so, you are toast! These toilets have basic design flaws. They simply don’t have sufficient power to flush the bathroom bowl correctly. In case you have one in every of these 1.6 gallon flush nightmares, hold on, help may be on the way. It appears that the 1992 legislation requiring these bad boys could be repealed. If this happens, 3.5 gallon toilets could come back.

Whistle While it Works

As the toilet tank fills and is sort of finished, it makes all sorts of excessive pitched noise, right? You most likely have an old fashioned ball cock fill valve with a float ball on an arm. These valves close slowly as the water stage rises and the valve begins to vibrate as this happens. The answer is a brand new fill valve. These new valves stay open completely till the bathroom tank is filled. The shut off is instantaneous.

Tough Toilet Bowl Stains

Do you have stains in your toilet bowl that just won’t budge? If so, DON’T use abrasive cleaners! Use white vinegar or muriatic acid to wash the bowl. White vinegar is safer, but takes longer. Muriatic acid can clean a toilet bowl inside minutes. Be careful!

Toilet Bowl Water Level Drops

After you walk away from the toilet, does the water degree mysteriously drop? If that’s the case, two things could be wrong. The toilet could be partially clogged. The clog can cause a siphon and pull water from the bowl. The other possibility is more severe: there could be a crack or small defect within the colon of the toilet. That is the channel that water passes by means of to get to the drain pipe. A colon crack or defect means it is time for a new toilet.

Low Energy Flushes

The water release holes within the lip of the bowl my be clogged with water deposits. Pour a quart of muriatic acid down the overflow tube in the tank to clean these holes. You should hear a sizzling sound if the deposits are heavy. The acid will not hurt the toilet. It’s also possible to attempt to open these holes with a toothpick should you do not have acid.

Shaking Toilet

Does your toilet rock whenever you sit on it? If so, the grout between the toilet and the ground must be replaced. Grout must be used as an alternative of caulk. Caulk is flexible and will allow toilet movement.

Water Leaks at Base of Toilet

In the event you see water leaking around the base of the bathroom or in the room below when it’s flushed, the wax gasket between the toilet and the drain pipe flange has to be changed. This is not a DIY friendly activity although the TV exhibits make it seem so! For those who tackle this, be sure to have access to a different toilet as you could be opening a can of worms! Contact Us and let Legacy Plumbing Company, your Raleigh Plumber fix this.

Save Water With Brick?

Putting in brick in a toilet tank to displace water could assist save a little bit water, however it usually causes more problems. Drop one while putting in it, and you could crack the tank. The brick also can interfere with the operation of the shifting elements in the tank, and cause less powerful flushes, resulting in more water being used.

Gradual or Noisy Refill Water Stream

If the water entering the toilet enters slowly, the shut off valve may be only partially open. Test to verify this valve is open all of the way. If water rushes into a toilet tank too quickly, close the valve so that the water flows in a more controlled fashion.

Still having problems with your toilet? Charlotte plumbing repair technicians are available 24 hours a day in Charlotte metro area. Simply call Charlotte Plumbing & Repair at (704)394-5252 or Contact Us, and we will call and schedule an appointment with you.
1025 w trade st
Charlotte, NC 28202