Toilet Water Level Low

Toilet Water Level Low

Toilet Water Level LowIs your toilet’s water level lower than usual? Is your toilet bowl not filling with water after flushing?

This common occurrence has a few potential culprits, and luckily, most are easy to adjust with a little plumbing know-how and a few minutes of your time.

4 Causes of Low Toilet Water Levels & How to Fix It

If your toilet’s water level is low, then you could have a damaged fill tube or fill valve, a cracked toilet bowl, or a blocked sewer vent line preventing the toilet bowl from filling with water or reaching the proper water level.

Read on to more learn about each of these common reasons for the water level in your toilet bowl being low and how to fix it.

1. Damaged Fill Tube

The most common reason your toilet bowl water level is low is a damaged fill tube. The fill tube is a small flexible plastic hose. It’s usually black or clear and connects to a vertical, wider plastic tube (called the overflow tube) within the toilet tank.

This small component is responsible for allowing water to flow into the toilet bowl each time the toilet is flushed. Over time, it can unclip from the overflow tube or simply succumb to general wear and tear. When this happens, the toilet tank fills with water and the valve shuts off the water flow before the bowl fills adequately.

SOLUTION: Lift the tank lid and visually inspect the fill tube to determine whether it has shifted or is damaged. If it’s in good condition but not connected to the overflow tube, place it back into the cylinder. If it’s damaged and cannot be adjusted or fixed, replace the fill tube.

2. Damaged Fill Valve

Your toilet’s fill valve is the part responsible for refilling the tank after you flush the toilet. It’s generally a white tube that connects to the water supply at the bottom of the toilet and has a shutoff valve at the top. When working properly, an air-filled ball or cup will float to the top of the tank and shut off the valve once the water reaches a certain height. Over time fill valves will wear out, so if your fill valve is damaged and not working properly, you can purchase a replacement at any hardware store.

SOLUTION: Inspect the fill valve and adjust or replace it if necessary.

3. Cracked Toilet Bowl

Although cracks in the toilet bowl are rare, they can happen. When there’s a crack on the lower toilet bowl, the water will leak out onto the floor. As a result, the water levels in your toilet bowl will be noticeably lower.

SOLUTION: Replace the toilet or attempt to seal the crack.

4. Blocked Sewer Vent Line

Although rare, low toilet bowl water levels can be caused by an issue with the sewer vent line.

The sewer vent line runs through the wall in your bathroom and out of the roof of your home. This important component of your plumbing system works to remove sewer gases when the toilet flushes. If there is no free flow of air through the vent line, the water level can be affected.

Possible reasons for blockage include:

  • Bird’s nest
  • Dead rodent
  • Leaves, small branches, and other debris falling onto your roof

SOLUTION: Remove the debris from the roof and shine a flashlight into the vent. If you see a clog, insert a plumber’s snake to dislodge it. If that doesn’t work, or you don’t see a blockage, call a plumber.

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