A weak flushing toilet can be frustrating and inconvenient, especially if it consistently fails to effectively remove waste from the bowl. There are several common causes for a weak flush. In this guide, we will explore these issues further and provide solutions to help you fix your weak flushing toilet.

5 Causes of a Weak Flushing Toilet

Some of the more common causes of a weak flushing toilet include:

  1. Clogged or blocked drain: A blockage in the toilet’s trap, drainpipe, or sewer line can restrict the flow of water and cause a weak flush.
  2. Low water level in the tank: If there is not enough water in the toilet tank to create sufficient pressure during flushing, it can result in a weak flush.
  3. Faulty flapper or flush valve: If the flapper or flush valve inside the tank is worn out or damaged, it may not lift properly when you press down the flush handle, leading to a weak flush.
  4. Mineral deposits or scale buildup: If you have hard water, mineral deposits and scale can accumulate, restricting water flow and causing a weak flush.
  5. Malfunctioning fill valve: If the fill valve is not functioning properly, it may not refill the tank and toilet bowl with enough water, resulting in a weak flush.
  6. Ventilation issues: Clogs or blockages in the vent pipe can lead to reduced airflow and result in a weak flushing toilet.

How to Fix a Toilet Not Flushing Strong

There are several things you can try when the toilet flush is weak before calling a professional plumber for assistance, as follows:

  • Check for a clog: Use a plunger to clear out any blockages that may be affecting water flow. It is worth mentioning if clogs are further down the sewer line, it can require professional cleaning to fully remove them.
  • Adjust the water level: Ensure that the water level in the tank is sufficient by adjusting the float mechanism on the fill valve. You can do this by turning the fill adjustment screw until the water level is higher.
  • Inspect the flapper: Check if the flapper is functioning properly. If it is damaged or worn out, replace it with a new one.
  • Clean mineral deposits and scale: Remove any mineral deposits or scale buildup from inside your toilet bowl and tank using a commercial cleaner specifically designed for removing limescale and hard water minerals.
  • Check bents for blockages: Vent pipes exit out the roof of your home. Check for leaves, bird nests, or other debris that could prohibit airflow. You can use a shop vac to help clean any obstructions.

When to Call a Plumber for Help with a Weak Flushing Toilet

Plumber fixing a weak flushing toilet

You should consider calling a plumber for help with fixing a weak flushing toilet if:

  • You have tried the common DIY solutions such as plunging, adjusting water levels, and cleaning deposits, but the issue persists.
  • There is visible damage or wear to components such as the flapper, flush valve, fill valve, or vent pipe that requires replacement.
  • You are not comfortable or experienced in working with plumbing systems and do not want to risk causing further damage.
  • The problem seems to be more complex than initially anticipated and requires professional expertise to diagnose and fix.
  • You notice other plumbing issues in addition to the weak flushing toilet, such as strange noises or water leaks.

Get Help Resolving a Toilet with a Weak Flush Today

When you need help resolving a toilet with a weak flushing toilet, count on the father-daughter team at Lynch Plumbing. We offer residential plumbing services in the San Fernando Valley and Los Angeles areas to quickly resolve any plumbing issue, no matter how big or small. We are also available 24/7 for emergency plumbing problems. Contact us today by calling 818-773-9514 to schedule an appointment.