Here are some problem areas and quick tips to do repairs on your own. Please call plumber if you're not comfortable with this process. You do not want to create a larger leak by forgetting to turn off your main water, or not tightening the gasket or valve properly.
1) Corroded Valve Seat- One of the most typical causes of a leaky faucet is a corroded valve seat. When water sediments collect on the valve seat, the spout will certainly start to leak. It is a smart idea to clean the valve seat on a regular basis to avoid this problem.
2) Malfunctioning O-ring - A faulty O-ring may be the most common factor for a faucet leak. The O-ring is a small rubber ring around the stem screw. Over time, they may weaken, permitting a trickle of water past the seal. To fix it, you'll have to disassemble the faucet from the handle down. This is an easy repair and can generally be done within minutes. Here is a great link to fixing your O-ring.http://home.howstuffworks.com/home-improvement/plumbing/how-to-repair-a-faucet4.htm
3) Washer is Worn Out- This is a regular problem for your faucet. Water pressure forces the washer up against the valve seat. This continuous pressure breaks the washer. The simplest repair is to change the washer. Often, if it isn't installed correctly or is not of the right size, it can cause leakage.
4) Loose Parts- A faucet is made use of a lot, the packing nuts and adjusting ring may become loose as you use them, triggering leaks. When you have a leaky faucet because of loose parts, you need to adjust the packing nut or change it entirely.
5) Seals are Worn Out- There are 2 types of seals: inlet seals and outlet seals. Similar to many of the other parts of your faucet, these seals are vulnerable to deterioration due to water sediment. This is likewise a main reason for water dripping. Work with a professional to clean or change your seals. This should quickly fix your leaking issues.
6) Broken Pipes or Fittings - A dripping faucet might be the result of a broken pipe or fitting. Damaged pipes establish fractures that might disrupt the water pressure and cause faucet drips from time to time. If you have attempted the above and the problem remains unfixed, then you should hire a skilled plumber to check your water pipes.