My toilet seems to have a leak but I can’t find it. After the tank fills, the water goes down a few inches and it has to fill again.

There are two things to check. First, check that the stopper at the bottom is in good condition. If in doubt, change it, which is easily done. Also check that the chain from the float to the stopper is not hanging down in the drain under the stopper. If all those are okay, check that…

My toilet keeps sweating and the dripping water is ruining the floor. What can I do?

The water on the toilet tank is actually condensation, caused by cold water chilling the tank, which in turn draws moisture from the warm bathroom air. To stop this, you can purchase a tempering valve that allows you to mix a small amount of warm water with that going into the toilet tank. Or there…

What causes my pipes to hammer?

Water rushing through the pipe and out the faucet moves with speed and force. When you shut off the faucet, the water flow is brought to an abrupt halt and that energy has to go somewhere. The result is the ‘pounding’ noise you hear. Products are available on the market to eliminate this problem.

Why is water leaking down the pipes that connect under the sink to my faucets? It is causing mold.

You might get lucky and solve the problem just by tightening the fittings to the faucet with a basin wrench, which is usually the only tool that can reach up there. If not, replace the connections with braided stainless flex tubing. Once the leak is history, treat the mold with a strong bleach solution (using…