What's actually causing this
Toilets run when water continuously trickles from the tank into the bowl. The two most common culprits are a worn-out flapper that doesn't seal properly, and a fill valve that's stuck open or set too high.
What you'll need
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- Toilet flapper kit Shop →
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Step-by-step fix
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1
Diagnose the problem
Lift the tank lid and add a few drops of food coloring. If color appears in the bowl within 10 minutes without flushing, the flapper is leaking.
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2
Turn off the water supply
Turn the shutoff valve behind the toilet clockwise. Flush once to empty the tank.
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3
Replace the flapper
Unhook the old flapper from the overflow tube pegs. Snap the new flapper in place and reconnect the chain — leave about half an inch of slack.
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4
Adjust the fill valve
If water is running over the overflow tube, the water level is too high. Adjust the float arm or float ball downward until the water sits 1 inch below the top of the overflow tube.
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5
Turn water back on and test
Slowly open the shutoff valve. Let the tank fill and listen for any continued running after the fill cycle completes.
In Minneapolis, tap water is very hard (290–380 ppm). Minneapolis has very hard water, sourced from Mississippi River and groundwater. Heavy mineral deposits accumulate rapidly. Water softeners are nearly universal. Hard water significantly reduces water heater lifespan.
Plumbers in Minneapolis typically charge $115–185/hr. Most homeowners budget $800–2,500 for common repairs like fixture replacement, drain clearing, or valve repairs.
Minnesota requires state licensing. Minneapolis requires permits and inspections. Homeowner exemptions limited to minor repairs.
Mix of pre-1950s and post-1980s construction. Older homes may have galvanized piping with corrosion. Freeze-thaw cycles cause burst risk; insulation and heat tape are standard. Very hard water means water softeners are nearly universal. Copper replacement is common.
Minneapolis experiences extreme cold — temperatures can drop below -20°F. Pipe insulation is essential, not optional. Frozen pipe repairs are among the most common winter emergency calls. Insulate all exposed pipes in unheated spaces and keep cabinet doors open during deep freezes.
DIY in Minneapolis: Minneapolis's moderate licensing and cold-climate focus support some DIY work. Winterization, freeze prevention, and water softener maintenance are common homeowner tasks. Extreme freeze risk makes professional HVAC and plumbing maintenance critical.
- The tank or bowl has visible cracks.
- The toilet rocks or is loose at the base — this may indicate a wax ring failure.
- Water appears on the floor around the base after flushing.
Let Uncle AI diagnose it first.
Describe the problem. Uncle AI asks the right questions and tells you exactly what's broken — and whether you should fix it yourself or call someone in Minneapolis.
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