Toilet takes 30 minutes to fill up after flushing
The toilet tank fails to refill immediately after flushing, instead sitting empty for about 30 minutes before suddenly making a loud hiss and filling back up. Additionally, some users notice bubbling in the toilet water after flushing.
What people tried
Every workaround mentioned in the threads below. We haven’t tested any of them — and nobody here is claiming they worked.
- 1Replacing the fill valve
- 2Cleaning or replacing the canister seal
- 3Checking if the float is sticking or rubbing against the side of the tank
- 4Try using a plunger
- 5Call a plumber
In their words
Unedited, grouped by where they were said, most upvoted first within each place, each linked to the thread it came from.
r/Plumbing2 people · September 2026 – October 2026
“My toilet flushes perfectly fine, but after flushing, no water starts coming out into the tank. About 30 minutes later, there will be a loud hiss and it fills up like normal and I can flush again.”source ↗
TeeheeTummyTums12 · r/Plumbing · 1 upvotes