Shutting off the water is often the first step of many plumbing projects. Locating and turning off the appropriate water shut off valve is therefore, very important. Aside from knowing where to shut off the water knowing a little about each time of water shut off valve is also a good idea.
Angle Stop Valves
Angle stop valves are the most common stop valves found under the kitchen and bathroom sinks.
There are some situations where straight stop valves are a better option for shutting the water off at a fixture. One example of a good use for a straight stop valve is when the pipes come in through the floor instead of the wall like in mobile home plumbing.
A compression stop valve is one of the easiest and quickest water shut off valves to install when your house has copper piping. It is always a good idea to replace fixture stop valves whenever you install new fixtures such as a toilet or faucet. A compression stop valve will go onto copper pipes easily so add them to your shopping list the next time you change a fixture.