Repairing Guides

how to repair toilet flush system

by Daphney Kuhn II Published 3 years ago Updated 2 years ago
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Recommended fix: Check and adjust either the chain or the float.

  • Remove the tank lid and flush the toilet. If the flapper drops back into place before the end of the flush, remove some...
  • Watch the tank as it fills back up with water. When full, note how high the water level is compared to the top of the...
  • Locate the fill valve—whose purpose is to let water fill the...

Full Answer

What causes a toilet not to flush completely?

There could be several reasons behind it, but the followings are the most common reason:

  • The Toilet Is Clogged.
  • Low water level in the toilet tank.
  • Problematic flapper of the toilet.
  • Clogged Rim Holes.
  • Problematic Lift Chain.

How to fix a toilet that won't flush?

To fix a toilet that won’t flush:

  • Unclog the toilet.
  • Open the toilet shut off valve.
  • Adjust the toilet tank water level.
  • Replace a warped/worn out flapper.
  • Fix a loose toilet handle.
  • Unclog the rim holes/siphon jet.
  • Adjust the length of the flapper chain.

How do you modify a toilet to be low flush?

What do I do if my toilet has low water pressure?

  • Check Your Water Level. To help your toilet flush efficiently, the water level in the tank needs to be at the correct level.
  • Check For Leaks. Many individual pieces make up your toilet tank.
  • Check Your Flapper.
  • Clogged Rims.
  • All Your Plumbing Needs Taken Care Of.

How do you manually flush a toilet?

When should you replace a toilet?

  • Constant Clogging. Nobody likes to deal with a clogged toilet.
  • Cracks. When you notice puddles of water around your toilet, you may want to check for cracks in the porcelain.
  • Plentiful Repairs.
  • Excessive Age.
  • Wobbling.
  • Inefficient Flushing.
  • Surface Damages.
  • Built-Up Mineral Deposits.

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How do you fix a toilet flushing mechanism?

0:392:52How to Fix a Toilet - Flush Valve Replacement - Part 1 of 2 - YouTubeYouTubeStart of suggested clipEnd of suggested clipAnd tank mounting bolts should also be replaced at that time to replace the flush valve the entireMoreAnd tank mounting bolts should also be replaced at that time to replace the flush valve the entire tank will have to be removed from the bowl of the toilet. Exposing. The sponge gasket.

How do you replace a toilet flush kit?

0:363:18How to install a Complete Universal Toilet Repair Kit Install by KorkyYouTubeStart of suggested clipEnd of suggested clipThe old fill valve locate and remove all old nuts bolts. And washers from the toilet tank carefullyMoreThe old fill valve locate and remove all old nuts bolts. And washers from the toilet tank carefully lift up on the tank and remove it from the bowl remove.

Why toilet flush is not working?

If your toilet isn't flushing all the way, it's most likely because of one of these problems: The water level in your toilet tank is set too low. Problems with your flapper. A clog in the toilet, flange or drain.

What are the different types of toilet flushing systems?

Types of Toilet Flushing SystemsGravity Flush. Traditional flush systems are powered by gravity, using the weight of the water itself to create flushing pressure. ... Pressure-Assisted. ... Dual Flush. ... Double Cyclone/Tornado Flush. ... Plumbing in Seattle and the Surrounding Areas.

How do you replace a old flush valve?

InstructionsShut off the Water. ... Remove the Toilet Tank. ... Remove the Tank Bolts. ... Remove the Old Flush Valve. ... Install the New Flush Valve. ... Install the New Tank Bolts. ... Set the Tank Onto the Bowl. ... Connect the Water Supply.

How do you install a fluidmaster complete toilet repair kit?

3:5817:13Installation tutorial for fluidmaster toilet rebuild kit - YouTubeYouTubeStart of suggested clipEnd of suggested clipLook in the instructions. And at least in a fluid master. Kit. See if we zoom this up. And then hereMoreLook in the instructions. And at least in a fluid master. Kit. See if we zoom this up. And then here is how that goes basically you're going to orient this to the rear. And away from the filler.

How do you replace toilet tank parts?

2:2614:13How to Fix a Running Toilet & Replace All Internal Toilet Tank PartsYouTubeStart of suggested clipEnd of suggested clipOk after removing the bolts. And the nuts from the underside of the tank you just simply lift up onMoreOk after removing the bolts. And the nuts from the underside of the tank you just simply lift up on the tank and remove it from the base of the toilet.

What type of flush valve do I have?

The first step you'll need to do is identify the brand of your particular valve, this is usually stamped onto the top or side of the plastic. Failing this the branding on the cistern or toilet might be the actual manufacturer of the internals, large brands such as Roca and Armitage Shanks generally follow this route.

How does a toilet flush valve work?

Integrated into the flush valve is a vertical overflow tube that extends up into the tank from the base of the flush valve. The role of the overflow tube is both to prevent water from overflowing the tank, and also to allow a small amount of water to flow down into the toilet bowl as the tank is refilling. A small refill tube placed into the top of the overflow tube allows a small stream of water to flow down into the bowl during the refill cycle. This restores the level of standing water in the toilet bowl, keeping the trap sealed.

What is the function of a flapper in a toilet?

The flapper or float ball seats against the val ve opening and keeps water in the tank until the flush handle is operated. When the handle is depressed, a chain or lift wire connected to the handle rod lifts the flapper away from the valve seat and allows the water to flush down out of the tank and into the toilet bowl.

How does a fill valve work?

Whatever the design, the fill valve works to automatically open the water supply valve when the water level falls in the tank during a flush, then shuts off automatically when the water level rises to a specific level in the tank. Depending type of design, the valve is operated either by a floating ball or a float cup that moves up and down with the water level in the tank. Floatless fill valves operate by sensing water pressure at the bottom of the tank.

Why is my toilet running?

The problem occurs either because the flapper is not seating itself correctly in the opening of the flush valve, or because the water level in the tank is too high and allows water to flow over the top of the overflow tube and down into the tank.

How does a toilet tank work?

The toilet tank's function is to hold a quantity of water until you flush the toilet, at which time the water in the tank rushes down through an opening in the bottom of the tank and into the bowl, forcing waste out of the bowl and into the home's drain and sewer lines. There are two major components in the tank ...

How does a floatless fill valve work?

Floatless fill valves operate by sensing water pressure at the bottom of the tank.

What is the bowl of a toilet?

Your home toilet consists of two major parts: the bowl unit that rests on the floor, and the upper tank that holds the water that is released each time you flush the toilet. The bowl is little more than a solid piece of porcelain drain fixture with no moving parts at all. With only a few exceptions, there aren't many repairs that involve the bowl.

What happens after a toilet flush?

After the flush, the flapper settles back into place, and clean water from a water supply line flows into the tank until the water level reaches a predetermined point , which causes the water flow to cease until the next flush. Here are the various parts you may encounter when repairing a toilet:

Why does my toilet stop flushing?

If the toilet starts to flush but then stops, the chain may be too loose (causing the flapper to close prematurely) or the fill valve may be allowing insufficient water into the tank. Here, toilet repairs can be as simple as adjustments made to these components. If you find yourself having to hold the handle down for the entire flush, the following steps will get your commode flushing correctly again.

How Does a Toilet Work?

The average toilet works via gravity and a siphoning effect. Water fills the toilet bowl about halfway, while additional water is stored in the tank. When someone depresses the toilet handle, the seal between the tank and the bowl (called a flapper) lifts, and water from the tank floods into the bowl. The water pressure forces the contents of the bowl to flow out of the toilet through the drain.

How to drain toilet water?

Turn off the water supply, and then flush the toilet to drain the tank and bowl. Some residual water will remain in the bowl after flushing—be sure to bail it out with a cup or use a wet-type vacuum. There should be no water in the toilet tank.

What is the lever that raises the flapper in the tank when the toilet is flushed?

Handle: The outwardly visible lever that raises the flapper in the tank when the toilet is flushed to allow water to run into the bowl.

What causes a toilet bowl to overflow?

A clogged commode will cause the bowl to overflow onto the bathroom floor, but the fix—which happens to be the most common of all toilet repairs—doesn’t have to ruin your day.

How to clear a clogged toilet bowl?

Clearing the clog is super simple, and you probably have a toilet plunger already on hand. Simply insert the plunger into the bowl while it’s still full of water, pressing the mouth of the plunger firmly against the opening at the bottom of the bowl to form a seal.

How to fix a toilet tank that is running water?

It's a wasteful and annoying problem. The common solution is to replace the flapper that seals the flu sh valve opening , a job made much easier with a repair kit (such as the Model 555C kit from Fluidmaster). A repair kit includes not only a new flapper, but also drain seat insert and a sealant ring that fit s over the existing flush valve opening. This kit allows you to create a new valve seat and install a new flapper without removing the toilet tank to replace the entire flush valve (or Douglas valve).

What to do when water is turned off in toilet?

Once the water supply is turned off, flush the toilet to drain the tank of most of the water.

What does a flush valve do?

Once the water supply is turned off, flush the toilet to drain the tank of most of the water. Depending on the age of your toilet, the flush valve can have either a rubber flapper or a tank ball assembly that controls the flow of water down into the toilet bowl during a flush. Both of these are usually mounted with a bracket ...

How to clean a plastic valve seat?

The easiest way is to use steel wool or fine sandpaper to scour the valve seat clean of any residual debris. A plastic or porcelain flush valve opening can be cleaned with a scrub brush. After scrubbing, wipe off the valve seat with a moistened soft cloth, then dry it fully with a towel.

How to position a flapper?

Try to position it at about a 45-degree angle to the front of the tank, so that the cone-shaped bottom of the fla pper can tank can freely pivot and open fully when lifted by the chain. Usually, the proper positioning is for the lift chain to be as close as possible to the handle lever. The chain should pull straight up or be angled slightly back toward the hinge of the flapper assembly.

Where is the shut off valve on a toilet?

This is done by closing the shut-off valve, usually located between the water supply pipe and the flexible supply stube that leads to the toilet's fill valve on the bottom left side of the tank. Turn the handle on the valve fully clockwise to shut off the water.

What happens if you notice cracks in valve seat?

If you notice cracks in the valve seat, it is beyond repair and will need to be replaced.

Why does my toilet not flush?

Toilets usually lack flushing power because the waste pipe, siphon jet, or rim jets are partially clogged, or the water level in the tank or bowl is too low. In those cases, clear the blockage and adjust the system to correct the water levels. Although less common, a broken fill valve or a clogged vent system may be causing your weak flushing ...

How to clear a jet flush hole?

Use an acidic toilet cleaner like Zep ( view on Amazon) and a brush to clear the jet flush hole of any build-up. Find a brush small enough that you can fit in the hole and twist several times to make sure the passageway is completely clear.

What to do if toilet is weak?

If you suspect that your toilet has a weak flush due to a vent system issue, call a plumber immediately. Vent systems are not something that you’ll be able to troubleshoot yourself, even with the help of Google and Youtube.

How does the water level in a toilet work?

When your toilet is not in use, the float sits on top of the water keeping the fill valve closed. When you flush the toilet, the water flows from the tank into the bowl, and the float drops, which opens the fill valve and allows new water to enter the tank. As the tank refills, the float rises with the water level. Once the float gets to a certain height, the fill valve closes.

How to shorten slack on toilet chain?

Most flapper chains have a clip that you can easily latch onto a different link to shorten the slack. If yours doesn’t, cut the chain with a wire cutter. By reducing the slack on the chain, the flapper will open easily and stay open longer each time you press the handle. This adjustment allows the proper amount of water to flush into the toilet.

How to clean rim jets?

The best way to completely clear the rim jets is to plug each jet with plumbers putty, pour acidic toilet cleaner into the overflow tube located in the toilet tank, and let the acidic cleaner sit for a while and dissolve the build-up and deposits. After a few hours, remove the plumbers putty and flush several times.

What is the jet hole in a toilet?

The jet flush hole, often referred to as the siphon jet, is a compartment in the front of the toilet that holds water and releases it at an angle to push waste directly into the trap upon each flush. Over time, calcium and other deposits can develop and block the jet flush hole, weakening your toilet flushing power.

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