Standard-size sink openings and faucet dimensions are used throughout the plumbing industry. However, since there are a few exceptions (such as 4" spread or 8" spread), it is a good idea to check sizes first.
Replacing the trim on an existing Moen tub/shower can be accomplished by first determining what kind of valve is in the wall. For many years Moen tub/shower valves have been manufactured using one of three valves. These valves are Standard, Posi-Temp and Moentrol. Although the look is similar, the trim is not necessarily interchangeable.
To determine if the trim can be changed without changing the valve in the wall, the first step is to identify what type you have. This chart(section) shows the differences.
Changing the O-rings on a 2 handle kitchen faucet is usually easier than a 1 handle. It is not necessary to turn the water off under the sink provided that no one turns the faucet handles to the on position while servicing.
Identifying the specific model number of your faucet and viewing the parts breakdown is suggested.
If the spout rotates and extends towards the sink at a low angle, a cap on the top of the spout unscrews (counterclockwise). A rubber jar gripper or a strap wrench makes this part of the job easier. Once the cap has been removed, rotate the spout while pulling upward.
If your faucet has a spout that is a high fill, cathedral or high arc spout there will be a collar that unscrews counterclockwise. When the collar has been loosened, pull up on the spout and remove it from the faucet. Many spouts will also feature a split white nylon washer to help secure the spout to the faucet.
Follow the same procedure for cleaning, replacing and lubricating as detailed above.
For directions, refer to your specific model's installation instruction sheet. These tools may help you during your faucet installation: