Hearing a toilet that never stops? Slide the rate — see continuous run → $/mo water+sewer cost.
1,800 gal / 30 days
~$22/mo water+sewer (illustrative)
Moderate continuous run — fix the flapper tonight.
Educational estimate only — use your rates and a meter delta. Confirm flow with a quiet-house meter test.
Guide · 5 steps · ~2 min read
How it runs → your rate → $/mo. Fix the flapper before the next bill.
A running toilet is continuous tank-to-bowl flow you can often hear — a hiss or trickle between flushes. A silent toilet leak is the same path (usually a worn flapper or flush valve) but quiet enough that homeowners ignore it.
EPA WaterSense notes household leaks waste about 180 gallons per week on average, and about 10% of homes waste 90+ gallons per day. A single running toilet is a common way to join that group.
If sewer charges track water volume, every wasted gallon is often billed twice (water + sewer).
Silent toilet leak costDrag the sliders on the Running Toilet Cost Calculator above:
Illustrative only — drop volume, run rate, and your tariff vary. Prove continuous flow with a quiet-house meter check.
Toilet dye testMost running toilets are a $5–$20 flapper or fill-valve adjustment — not a full fixture swap.
If the running sound stops and the meter delta drops to near-zero, the fix worked. Only after the leak is sealed should you evaluate a WaterSense replacement for long-term efficiency.
Toilet fix vs replaceAfter the flapper fix, run a meter proof:
If the meter still moves, expand to other toilets, irrigation valves, and service-line isolation. Then document the fix and meter readings if you need evidence for a utility leak adjustment program.
Overnight meter testA running toilet is one cause class. After you have a $/month estimate, run the full high-bill diagnosis so you do not miss a rate-tier jump, sewer math, or outdoor use that compounds the running toilet waste.
Why is my bill so high?You have checked off each step. Choose your next action below.
Instant plain-English answers about running toilet cost calculator continuous run flapper leak — powered by AI.
Educational estimates, not professional advice. Sources linked below.
Keep one primary page per question. These siblings cover the rest of the high-intent set.
National diagnosis: usage vs rates vs sewer vs silent leaks.
Dye-test, size the waste, fix the flapper before upgrading.
Drip Meter: drips/min → gallons → $/month bill proof.
Stuck schedules and broken heads before indoor gadgets.
Units per day — not dollars — when the total lies.
Catch-up dump after a low estimated read.
Gallons you keep vs sewer you may credit.
Set dials, match the bill, catch misreads.
24h timeline: municipal demand vs internal pipe/pump.
Drop-timer: Slow seep vs Fast waste gal/day.
Stormwater/impervious fee — Drainage Delay over 48h.
Quiet house, jumping bill — check the outdoor timer.
Municipal vs recommended PSI — age the valve, size waste.
Whole house vs one fixture — name the cause before you call.
Safe Zone vs Shock Zone — prior actual vs this estimate.
It depends on the run rate and your combined water+sewer price. Educational example: 100 gallons/day continuous at $12 per 1,000 gallons water+sewer is roughly $36/month for a 30-day cycle. Severe runs (on the order of 200 gal/day) can be double that. Use the calculator with your count and rates.
Listen for a continuous hiss or trickle between flushes. Watch the tank water level — if it refills every few minutes without a flush, the fill valve is making up for tank-to-bowl flow. Run a dye test (color in the bowl without flushing) to prove the path.
Slow trickle: ~20 gal/day. Moderate continuous: ~50–100 gal/day. Severe: on the order of 200 gal/day. Prove the rate with a quiet-house meter check over 30–60 minutes, then multiply by 24.
If sewer is volumetric (common), yes — water that went down the drain is often billed as both water and sewer. Use a combined $ per 1,000 gallons on the slider when that matches your tariff.
Expand the quiet-house meter test. Check other toilets with a dye test, irrigation timers, and rate/sewer changes. Start with the why-is-my-water-bill-so-high guide so you name the real cause class.