To get started, shut off the water supply by closing the shut-off valve behind your toilet. Flush to drain the remaining water from the tank. Unscrew the push button, then carefully lift off the tank lid to inspect inside. You'll now see the source of the leak—common issues include faulty seals, floats, or valves, with repairs varying by the problem.
Water dripping both outside and into the bowl often signals a worn gasket at the tank's base. Replacing it is a simple DIY fix. First, unbolt the tank, then remove the flush mechanism with an adjustable wrench. Install the new gasket and reassemble properly. If you've tackled tile grouting or window insulation before, this will feel straightforward.
Constant water flow into the bowl usually points to a scaled-up bottom valve. Pour white vinegar over it to dissolve limescale buildup—problem often solved. For severe damage, replace the valve entirely.
If water overflows through the pipe, adjust the float arm to the proper position. A punctured float requires disassembly and replacement with a new one.
