July 30, 2021

3 Causes Of A Slow Filling Toilet

Is it possible that the water in your toilet is taking too long to fill after a flush? A slow filling toilet is an issue that many homeowners face. There are a number of possible causes for this problem. While none of these are very severe or costly to fix, recognising the issue may assist you in finding the best remedy to have the toilet working properly again as soon as possible.

Continue reading to discover three typical causes of a slow filling toilet, how to diagnose the issue, and how to repair it.


Why Does It Take So Long for the Toilet to Fill?

A toilet tank will typically refill in approximately a minute, depending on your home’s water pressure. If you find it’s taking a long time, you may have a problem that has to be addressed.

Here are three reasons why you may have a slow filling toilet:


1. Issue with the Water Supply Valve

The water supply valve is the knob that protrudes from the wall immediately below your toilet tank and regulates the amount of water that flows into it. It may not be able to provide the correct quantity of water at the appropriate pace if it is partly closed or not working properly. Another problem with the valve is debris accumulation, which may limit water flow and slow down the valve’s filling pace.

Check the valve to make sure it’s fully open as a troubleshooting suggestion. Contact a professional plumber to inspect the valve for junk accumulation if a fully opened valve is still not generating enough water to replenish the tank.

2. Fully Soaked Float Ball 

A float ball rests on top of the water in the tank to regulate the quantity of water that comes in. If the float ball is clogged with water, the tank will take longer to fill. As a consequence, it may prevent enough water from entering the tank or cause the water to refill at a slower pace than intended.

Remove the toilet tank lid and check the water level as a troubleshooting suggestion. You may have a waterlogged float ball if the tank is only half filled or the ball is not floating towards the top of the tank. The good news is that changing the float ball is as simple as removing the old one from the float arm and replacing it with a new one.

It’s worth mentioning that a float ball is a relic of the toilet industry. If your inner toilet pieces are worn out, try replacing them with new components.

3. Problems with the Fill Valve Tube

Inside the toilet tank, the fill valve is connected to a vertical tube-shaped mechanism. The fill valve’s purpose is to keep the tank’s water level under control. Fill valves may wear out, clog, or move out of alignment over time. Any of these problems may prevent the toilet from properly filling with water.

If you’ve ruled out the water supply valve or a clogged float ball as the source of the issue, it’s time to investigate the fill valve. Examine the valve for indications of wear and tear, as well as improper placement inside the tank. It’s usually placed on the left side of the tank, with a tailpiece that extends through the bottom and connects to the supply tube and shut-off valve.


What to Do If Your Toilet Isn’t Filling Up Fast Enough

Now that you know what’s causing your slow filling toilet, here are some specific actions you may take to resolve the issue.

1. The water supply valve should be opened.

The water supply valve may only be partly open at times. Check the valve to make sure it’s completely open.


2. Fill Valve Adjustment

To adjust the fill valve, follow these steps:

    • Remove the tank lid and look for the fill valve, which is typically on the tank’s left side.
    • Make sure the fill valve is connected to the tube firmly and evenly.
    • To allow more water into the tank, remove the adjustment screw with a flathead screwdriver and lift the fill valve on older toilets.
    • Turn the fill valve adjustment knob with your hand to allow more water into the tank on modern toilets.
    • Make sure the water level in all toilets is approximately an inch below the top of the overflow tube.
    • After flushing the toilet, check to see whether the tank is filling at the proper pace and with the appropriate quantity of water.


3. Fill Valve Should Be Cleaned

Have you seen any mineral deposits or gunk on the valve? Here’s how to get it clean:

    • Remove the tank lid and turn off the toilet’s water supply.
    • Remove the fill cap and the screws on top of the fill valve.
    • To avoid being sprayed, slowly turn on the water supply while cupping your hand over the valve.
    • Allow unrestricted passage of water through the valve to clean away trash and accumulation.
    • After a few seconds of letting the water run, turn it off.
    • Find the washer by flipping the fill cap. Remove it with a screwdriver and scrape away the mineral accumulation with a gentle scrub.
    • Replace the fill valve if you detect cracks.
    • Finally, reinstall the valve, tighten the screws, and turn on the water to check whether the issue has been resolved.


4. A Waterlogged Float Ball Can Be Repaired or Replaced

    • Examine if the float arm connected to the float ball is positioned too low in the tank. If this is the case, bend the arm slightly upward to enable more water to flow into the tank as the ball climbs higher in the tank.
    • If this doesn’t work and you’re still certain it’s the float ball, you’ll need to replace it or talk to your local plumber about changing to a newer type mechanism.


5. Troubleshoot a Valve Tube Issue

Cleaning dirt out of a blocked valve tube is the first step in repairing it.

    • To begin, turn off the water supply.
    • Disconnect the valve’s hardware.
    • To wipe out the tube, use a thin wire or a bottle brush.
    • To flush away any leftover residue and remove any blockages, open and close the water supply valve a few times.
    • Check to see whether the toilet starts to fill correctly after flushing by replacing the hardware and the tube.
    • Replace the valve tube if it has holes, rips, or seems to be worn or damaged.


If you need toilet repair or replacement, call Elite Group

Want to save time, skip the headaches of troubleshooting, and get professional toilet repair? Elite Group in the North East and surrounding areas has a staff of certified plumbers that can help you with toilet repair and replacement. To get started, contact us for a quote.

You may be interested in our other article which will help you avoid plumbing emergencies.