Really you should not do this yourself unless you are relatively experienced and have the proper tools. Shut off the water at the meter. Drain the pressure from the system. Get the Outside diameter of the pipe on each side of the valve. You will need 2 pressure couplings and a new valve in between. You will need room to install your pressure couplings at least 2" of straight pipe on both sides of valve.
Turn the valve so that the flat part goes across the direction of the water flow through the pipe.
Do I need to shut off the water to my house in order to do some shower repair? If so, where would the knob be located?
from the valve past, fowing in the direction of the liquid or gas. example: water supply coming from the street to your house, enters your house where your main water shut off is. then the water is distributed through your house to different fixtures. downstream of your main shut off would be everything past that valve in the direction the water is flowing, or all water lines IN your house.
A water Toby is a shut valve at a water main
The valve seat or washer on the main valve are not seating/sealing properly.
I do not live in a condo thus I have no need to shut the main valve
Outside at the main shut off valve. Showers/Bathtubs do not normally have a shutoff valve like sinks and toilets. The main water valve for the house must be turned off.
Water will run until a valve or pump is shut off upstream from water main break.
the hot water valve shut off valve shuts off the hot water. The cold water valve shuts off the cold water. ;()
With the water main shut of valve of course
By a shut off valve connecting it to the main pipe to your apartment or house.
After a main water valve is closed the system's PVC pipes are still full of water and will drain to the lowest sprinkler head until the system is empty.
If the shut off valve turns but does not shut the water off, the washer in it has split and probably made it to the faucet. It was blocking part of the hole on the hot side and at some point either shifted or made it through the faucet and in in the screen in the end of the spout. Shut the main water off and replace the washer in the shut off valve.
In every home thee are a number of shut-off valves. Where the water pipe enters the house is the main shut off, usually beside the PRV, a bell shaped device for regulating the house pressure. This main cold line will then branch off to the water heater, bathrooms and kitchen. Each faucet and the water heater and the toilet will have a shut-off valve. The hot water line comes out of the top of the heater and goes to bathrooms and kitchen. Each hot faucet also has a shut-off valve under it.