Quick Answer:
If your toilet is refilling slowly after a remodel, the most likely causes are construction debris in the supply line or fill valve, or a partially closed shutoff. Start by checking the shutoff valve, inspect the supply line for debris after remodel, and remove and clean the fill valve screen if you see construction dust. If cleaning doesn’t help, call a plumber.
Why This Happens
Remodel work generates dust, grit, and small particles that can enter open plumbing or be pushed into lines when water is turned back on. Nearby work may also mean someone partially closed the shutoff and didn’t reopen it fully, or a new fitting was tightened in a way that restricts flow. Small screens and filters at the base of the fill valve easily trap construction debris and slow the refill rate. For related situations see Tank refills slowly after filter install and Slow refill after turning water back on for more context.
Step-by-Step What to Do
1. Verify the shutoff is fully open
Locate the shutoff on the wall behind the toilet and turn it counterclockwise until it stops. If it was only partially open, that alone can cause a slow refill. Test by flushing and watching the flow.
2. Inspect the supply line for debris
Turn the shutoff off, place a towel and small bucket under the connection, then disconnect the flexible supply line from the fill valve. Look inside the line and at the valve inlet for visible grit or particles. If you see debris, gently flush the line into the bucket until the water runs clear before reconnecting.
3. Remove and clean the fill valve screen
Many fill valves have a small mesh screen where the supply line meets the valve. To clean it:
- Shut off the water and flush the toilet to empty the tank.
- Disconnect the supply line at the valve (have a towel and bucket ready).
- Inspect the screen and O-ring. Rinse the screen under running water and use a soft brush to dislodge dust. Do not use metal picks that can damage the screen.
- Reassemble, turn the water back on, and test the refill speed.
4. Flush and test the system
With the supply line reattached and the shutoff open, flush several times to confirm normal refill. If flow is improved, the problem was debris or a dirty screen. If not, proceed to the next checks.
5. Check for damaged or restricted parts
If cleaning doesn’t help, inspect the flexible supply line for kinks or internal collapse. If the shutoff valve feels stiff or leaks, it may be partially clogged or damaged and should be replaced by a pro.
What Not to Do
- Don’t ignore remodel debris inside valves—this often worsens; if cleaning fails, a plumber is appropriate.
- Don’t force fittings or use excessive wrench pressure—you can strip threads or crack plastic parts.
- Don’t poke screens with sharp metal objects; you can enlarge or tear them and create leaks.
- Don’t run the toilet with the shutoff partly closed to “speed things up”—that can damage internal components over time.
When to Call a Professional
- If cleaning the screen and flushing the line don’t restore normal flow.
- If the shutoff valve leaks, is broken, or won’t open fully.
- If the supply line is damaged or you find signs of corrosion or aging piping.
- If you’re unsure about removing parts or the fittings won’t come loose without risking damage.
Safety Notes
- Always shut off the toilet shutoff before disconnecting the supply line.
- Have towels and a small bucket ready to catch water when you disconnect fittings.
- Use hand tools carefully; avoid excessive force that can break plastic fittings.
- If your home has older plumbing, consider having a plumber inspect for lead or other hazards before doing more work.
Common Homeowner Questions
- Will debris clear itself after a few flushes? Sometimes small particles wash out, but if the refill remains slow you should inspect and clean the screen and supply line.
- Can I replace the fill valve myself? Yes, many homeowners can replace a fill valve, but stop and call a plumber if you’re uncomfortable or if fittings are corroded.
- Is it safe to run the water while checking the line? No—shut off the supply before disconnecting to avoid water damage and uncontrolled flow.