Toilet will not fill up

You will have to disassemble the fill valve and clean it. When you shut the water off and on to work on the sink it dislodged dirt and scale in the water piping which clogged the toilet fill valve. Check your lavatory sink areators too they may also be partially plugged. Hope this helps.
Bob

The flapper at the bottom of the tank is leaking and needs replacement.

If there is a continual leak in to the toilet bowl you will likely need to replace the flush valve or the toilet flapper.

As a first step try try cleaning the sealing surface of the flush valve to se if the flapper will seat and make a seal.

If this does not work and the flapper is visibly detioriated and breaking down shut off the water supply, remove the toilet flapper and visit your local plumbing supply store to purchase a suitable replacement. Install the new flapper, turn on water supply.

These illustrated instruictions may also assist:

http://www.danco.com/HowTo/How-To-Replace-a-Toilet-Flapper

Although less likely, if the sealing surface of the flush valve is damaged or detioriated proceed with replacement of the flush valve. Again turn off water supply and follow the instructions set out here:

http://www.danco.com/HowTo/How-To-Replace-a-Flush-Valve

If there is not a leak in to the toilet bowl and the water flow does not shut off completely, then water is flowing through the fill valve and the overflow pipe and you may need to adjust the float and float rod to allow clsoure of the fill valve. See here:

http://www.danco.com/HowTo/How-To-Replace-a-Float-and-Float-Rod

Is the flapper valve slow to return to the closed postion allowing water to flow through the flush valve? Make sure the toilet flapper is moving freely and is sealing properly against the flush valve. If there is no lengthy or continual water flow in to the toilet bowl then this is not the problem.

Is the water valve on the water fill line to the toilet tank fully open? This may seem silly but it could be this simple.

Check to make sure your fill valve is opening fully. If you have an older toilet there may be some deposits that need to be cleaned way to allow free movement.

If toilet does eventually fill to the desired level, there is no leakage, water valve on fill line is fully open and fill valve is opening fully then recommend you shut off water supply, drain toilet and disconnect water fill line from the water valuve and toilet tanke to make sure there is not a blockage. If the water line and connections are clear you may need to remove the fill pipe in the tank and check for blockage. If this is very old, conisdering the cost and effort, it may be simpler to replace at this time rather than trying to extend the life.

there is likely a sediment build up either in the fill valve of the toilet or possibly in the supply line. You can try shutting off the water to the toilet, disconnecting the supply line from the tank and running the water into a bucket to see if the toilet is getting a water supply. If so, then you may need to replace the fill valve. For future reference:
Any time you install a new toilet or remove and reinstall a toilet, it is a good idea to flush the water lines (as described above) before replacing the fixture. This can help to remove sediment from the water lines and the Shut off valve and prevent the sediment from building up (and eventually clogging) the fill valve.

If you have a supply shut off to fixture shut it off and disconnect supply line from inlet to toilet . If your supply line to toilet is a flexible line then bend it so that you can direct water to small container. Slowly turn valve on to see what flow rate is at that point. If flow rate is not good then I would shut water off to house and replace valve. If flow rate to toliet is good I would reccomend you replace flush vallve. To do this shut off water supply to toilet. Disconnect supply nut to bottom of flush valve. There will be a retaining nut that holds flush valve in place in toilet tank. Remove flush valve after removing fill tube from flush valve to overflow tube. Replace with toto replacement valve or use Fluidmaster 400A. Instructions on box of 400A are easy to follow and if you have flex connector you won't need supply line washer. I would reccomend that before you install new valve that you put rubber gasket on shank of valve and slid it about halfway up the shaft. Make sure that inside of tank is dry and use a small bead of silicon caulking on top and bottom side of shaft gasket. slid gasket the rest of the way on valve shank,install in tank and put on retaing nut hand tight. Push down on top of valve and using channel lock pliers finish tightening nut securely.You may need to reach into tank and grasp valve body to stop it from turning. There are other things you can do if you have a working supply valve. Shut off valve and remove screws that hold top of valve in place and remove and clean surfaces. You can turn valve on slowly to help flush out any rust or mineral deposits. I hope this is of some help to you. Thanks

replace your flapper!!!!!!!!!!

THE WHITE PIECE IS LOCKED IN YOU MUST PUSH DOWN AND TURN A HALF OF TURN .THEN LIFT IT OUT,DON'T DAMAGE YOUR O RING

If there is no water on the floor then the water is leaking down the main tank drain. Take off the tank lid, turn off the water supply to the toilet. Fllush as much water out as you can. Look at the main drain, sometimes if the flapper valve is connected with a chain, the chain can get caught between the flapper valve and the drain hole, the flapper valve is pliable so it tries to seal around the obstruction but can't always do it. Make sure there is obstruction, that the flapper valve is not out of shape or old and non-pliable and that it lines up with the drain hole and doesn't get "hung up" on anything.

for the upstairs if the valve is fully on there is not much you can do other than replace water service to the house or heaven forbid repipe.Valves usually don't restrict fill volume.But you can take the supply loose from the tank and stick it in a bucket turn the valve on and check the flow.this should narrow it down.Down stairs repair or replace flush valve