Okay, last one unless I get asked for anything.
Drips in sinks and bathtubs.
Every faucet or shower assembly has moving parts that allow the water to flow where it is supposed to and to turn off and on. Each manufacturer is slightly different.
Inside any faucet or shower assembly there are rubber parts. Rubber makes a great seal. Tear in the rubber means weak seal which means a drip.
Let's talk first about the kitchen faucet. Let's say you see water around the base of the spout. This is actually a leak. Remember, a drip is in a spout, a leak is in a pipe. The spout is a pipe. Kitchen faucets have movable spouts so you can fill up either side of a sink. Those movable spouts have a rubber O-ring.
Take a pair of channel locks and remove the spout cinch ring. Now wiggle the spout and it will come out of the well. The O-ring will either be worn or missing. If it if missing it may be down in the well. If you cannot find it no big deal. Take the spout to the hardware store instead of the O-ring. They should be able to match it correctly quite easily.
Now if the water is coming out of the spout this is a drip. This is caused by one of three things. It can even be multiple things.
This is a stem...
This particular one is for a shower. This is one for a faucet...
On the bottom of all stems are rubber washers. On many, like the tub one above, there is a phillips screw holding it in place. If these washer show any indentation at all they are worn and will begin to drip.
You can replace the entire stem for under 10 bucks most of the time. Or you can replace that washer for a few cents and usually that is enough. If the stem is worn out, replace it. If it looks fairly good, replace the washer.
Now, often there is a piece that wears out these washers that is inside the faucet or the shower assembly. These are called seats.
I picked a large picture so you can see the seats.
Notice the square hole in the middle. This is for a special "seat wrench." Looks like this.
Or you can get a fancy one with a ratchet wrench. Even the fancy ones are under 15 bucks.
Simply put the seat wrench into the seat and remove it. You might see where it is pitted. This is causing much bigger leaks.
Put the new seat in with the wrench and replace the stem with the new washer and the drip is fixed.
One point about some single lever shower controls. Many of these, particularly Delta brands require you to buy a repair kit. They are very cheap and come with instructions. Replace all of the moving parts with new parts from the kit. It is really very easy to do.
One last reminder from a previous tip. On the shower stem shown above there is a nut at the base of the stem. This is the packing nut. If you see water coming out of your shower handle it means that but is loose.