Symptoms
- Water splashes out or up during flushing
- Loud flush with visible turbulence
- Started after a fill valve or flapper was replaced
- Happens with every flush, not just occasionally
Likely causes
- CommonTank water level set too highMore water than needed rushes into the bowl at once, increasing splash.
- PossibleReplacement part with different flow characteristicsA newly installed fill valve or flapper may release water faster or differently than the original.
- PossibleHigh water pressureExcess incoming pressure can increase the force of the flush beyond normal.
What to do
- Check the tank water level and lower it slightly if it's above the recommended mark (usually an inch below the overflow tube).
- If you recently replaced the flapper or fill valve, compare the flush behavior to before and consider trying the original style of flapper.
- Check household water pressure with a gauge if flushes seem unusually forceful throughout the house.
- Confirm no debris or object is affecting the bowl's water pattern.
- Accept a slightly higher splash level if it's just a byproduct of a properly functioning, code-compliant low-flow toilet, since this is sometimes just a design trait.
Tools and parts
- Pressure gauge (optional)
When to call a pro
A plumber isn't usually necessary for splash issues alone unless combined with a house-wide high-pressure problem.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.