Additional shut off valve, below sink or in basement. Incomplete pipes not tied into bathroom sink line.
Snake your drains
An average bathroom sink is 6-7 litres
The water could be turned off under the sink or at some other point in the supply line.The pipe could have become clogged with rust or other impurities.The faucet could be operating improperly and not opening. (A washer that has broken and blocked the piping.)The screen filter over the faucet could be filled with small gravel or rust.If you have no water flow it is the aerator or both pipes are frozen (located on an outside wall)The possibilty of both H&C being blocked with internal corroson is NIL for both to stop the supply at the same time
Most times a bath / lavatory sink will stop water flow because of hair that accumulates in the trap of the drain ,The trap is the upside"S"underneath the sink ...Try using liquid plumber foaming pipe snake that you can buy at your favorite grocery store.
Place some towels under the sink to catch any drips while doing this procedure. Turn off the valves under the sink that supply water to the faucet. Disconnect the supply lines to the faucet. Place a bucket under the drain pipe. Disconnect the p-trap. Drop the trap into the bucket. The mechanics of the sink have been disconnected now the sink needs to be removed. If it is a pedistal sink, look for screws or bolts unterneath by the faucet. I've installed in vanity, those sinks are usually glued to the cabinets. Use a prybar to separate it. http://www.lets-do-diy.com/Projects-and-advice/Bathroom/Basins-and-bidets.aspx
To turn off the bathroom water supply, locate the shut-off valve usually located behind the toilet or under the sink. Turn the valve clockwise to close it and stop the water flow.
The purpose of a bathroom sink shut off valve is to control the flow of water to the sink. To properly operate it, turn the valve clockwise to shut off the water supply and counterclockwise to turn it back on.
To connect water lines to a bathroom sink, follow these steps: Shut off the water supply. Install the faucet onto the sink. Connect the hot and cold water supply lines to the corresponding faucet valves. Use plumber's tape to secure the connections. Turn on the water supply and check for leaks. Adjust the water flow and temperature as needed.
Common issues that can arise with bathroom sink water supply lines include leaks, clogs, low water pressure, and corrosion.
remove aerator
To replace a bathroom sink hose, first turn off the water supply. Disconnect the old hose from the faucet and the water supply valve. Install the new hose by connecting it to the faucet and the water supply valve. Turn the water supply back on and check for any leaks.
To install a bathroom sink, first turn off the water supply, disconnect the old sink, place the new sink in position, connect the drain and water lines, secure the sink to the wall or vanity, and test for leaks.
Using a low flow aerator in a kitchen or bathroom sink can help save water and reduce water bills. It also helps conserve energy used to heat water, and can prevent splashing and create a smoother water flow.
To remove a bathroom sink, first turn off the water supply valves underneath the sink. Next, disconnect the water supply lines and the drain pipe. Loosen the sink from the countertop or vanity by removing any mounting clips or brackets. Finally, carefully lift the sink out of its position and set it aside.
To install a bathroom sink, first turn off the water supply and disconnect the old sink. Place the new sink in position and secure it to the wall and countertop. Connect the drain and water supply lines, then seal around the edges. Test for leaks and make any necessary adjustments.
To repair a bathroom sink, start by turning off the water supply and removing the sink stopper. Check for any clogs or leaks in the drain and pipes. Replace any damaged parts, such as the faucet or drain assembly. Reassemble the sink and turn the water supply back on to test for leaks.
To turn off the water under the sink in the bathroom, locate the shut-off valve usually located on the water pipes beneath the sink. Turn the valve clockwise to close it and stop the water flow.