What's on a toilet maintenance checklist?
Updated August 2026
Keeping a toilet healthy is nearly free and mostly about the leaks you cannot hear: run a dye test once a year, swap the flapper every 4 to 5 years, and replace the fill valve every 5 to 7. The silent flapper leak is the sneaky one, quietly passing water from tank to bowl and wasting around 200 gallons a day. The parts run $5 to $20 and the wax ring underneath lasts 20 to 30 years, so a toilet almost never needs replacing, just refreshing.
| Task | Interval | Effort |
|---|---|---|
| Dye-test for a silent leak: drops in the tank, wait 15 minutes | Yearly | 15 min · DIY |
| Check the supply line and shutoff for weeping | Yearly | 2 min · DIY |
| Snug the tank-to-bowl bolts and base if it rocks | Yearly | 10 min · DIY |
| Task | Interval | Effort |
|---|---|---|
| Replace the flapper | 4–5 years | $5–15 · DIY |
| Task | Interval | Effort |
|---|---|---|
| Replace the fill valve | 5–7 years | $10–20 · DIY |
| Task | Interval | Effort |
|---|---|---|
| Reset the toilet on a fresh wax ring | 20–30 years | $50–200 pro |
What neglect costs
A running toilet is the quiet budget killer. A worn flapper that no longer seals lets the tank bleed into the bowl, the fill valve tops it back up, and the cycle repeats all day. At roughly 200 gallons a day that is easily thousands of gallons a month on your water bill for the sake of a $10 part. A leak at the base is worse than expensive water: a failed wax ring lets water and sewage seep under the flange and rot the subfloor, turning a $10 ring into a $500-plus floor repair. See what a running toilet costs in real dollars.
Leave these to a pro
Nearly everything here is a DIY job with a $10 part and thirty minutes. Hire a plumber for the wax-ring reset if the toilet rocks or leaks at the floor, because that means pulling and resetting the bowl and sometimes repairing a corroded flange, usually $50 to $200. Also call a pro if the tank or bowl itself is cracked, or if a fresh fill valve does not fix a phantom refill, which can point to a hairline crack in the porcelain. For replacement timing, see how long a toilet lasts.
This whole checklist ships as reminders in OnOtto: every task above, on the right schedule for your home, snooze-proof.
Load this checklist as remindersFrequently asked questions
How do I test my toilet for a silent leak?
Drop a few drops of food coloring or a dye tablet into the tank, then do not flush for 15 to 20 minutes. If color shows up in the bowl, the flapper is leaking and water is passing through unseen. It is the fastest way to catch the waste before it hits your bill. Run it on every toilet, since the quiet ones can leak for months unnoticed. The leak-check interval page has the routine.
How often should I replace the flapper and fill valve?
Flappers wear out every 4 to 5 years as the rubber hardens and stops sealing; fill valves last 5 to 7 before they whine, run on, or fail to shut off. Both are under $20 and swap out in fifteen minutes with the water off. If your water is chlorinated or very hard, expect the shorter end of both ranges. The fill valve interval page covers the swap.
Why does my toilet keep running?
Almost always the flapper. It hardens, warps, or catches on the chain, so it does not seal and the tank never stops refilling. Next most common is the fill valve set too high, spilling into the overflow tube, or a float that will not shut the valve off. Check the flapper first, then the water level, which should sit about an inch below the top of the overflow tube. Both are cheap DIY fixes.
Do I ever need to replace the whole toilet?
Rarely for mechanical reasons, since every working part is replaceable for a few dollars. The real reasons to replace are a cracked tank or bowl, a wobble that keeps breaking the seal, chronic clogs from an old low-flow design, or a remodel. A quality toilet lasts decades and the porcelain effectively lasts forever. See how long a toilet lasts for the details.