Sometimes, even a Kohler product needs replacement parts for any number of reasons ... a running toilet or how to replace the toilet flush valve. What should you know about buying replacement ...

Q: My toilet is causing me fits ... The problem is usually with the flapper or flush valve assembly. The flush valve (aka Douglas valve) is what the flapper sits on. It is located in the center ...

In Consumer Reports' toilet tests ... the aftermarket Kohler K-1954-0 kit, $50; this means no dual-flush, top-mount flush, pressure-assist, or ballcock-valve toilets. The retrofit kit installs ...