Symptoms
- Tank stays empty or very low after flushing
- No refill sound at all
- Bowl doesn't get water back
- Handle flushes but nothing comes back in
Likely causes
- CommonShutoff valve partly or fully closedThe small valve behind the toilet controls water flow and may have been bumped or turned off.
- CommonFailed fill valveThe fill valve's internal mechanism has worn out and no longer opens to let water in.
- PossibleClogged fill valve inletSediment from the water supply can block the small inlet screen on the fill valve.
- PossibleKinked or damaged supply lineThe flexible line from the wall to the tank is pinched or has failed.
- Less commonWater shut off to the house or areaA main shutoff or municipal outage can stop flow to just that fixture if it's the last in a line.
What to do
- Check the shutoff valve at the wall behind the toilet and turn it fully counterclockwise to open.
- Check other faucets in the house to rule out a whole-house water outage.
- Look at the supply line for kinks or a visible leak between the wall and the tank.
- Remove the tank lid and lift the fill valve's float to see if water starts flowing; if so, the float or fill valve needs adjustment or replacement.
- Turn off the shutoff valve, disconnect the supply line, and check the fill valve inlet screen for debris.
- Reconnect everything and turn the water back on slowly, watching for leaks at the connections.
- Replace the fill valve if it still won't let water through after cleaning.
Tools and parts
- Adjustable wrench
- Small cup or bucket
- Replacement fill valve (if needed)
Toilet fill valveSearch: “universal toilet tank fill valve”
When to call a pro
Call a plumber if the shutoff valve itself won't open or turn, since a stuck valve may need replacing.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.