Guide · 4 steps · ~2 min
Silent toilet leak cost.
Common. Large enough to matter. Testable tonight.
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Step 1
Dye-test every toilet
Color in the bowl without flushing = leak path. Do every bathroom — one bad flapper is enough.
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Step 2
Size the waste
EPA-scale leak waste is large enough to show up in weekly gallons. A running toilet is often the #1 silent indoor leak.
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Step 3
Fix before you upgrade
Flapper/fill valve first. WaterSense toilets matter later — proof mode first.
Toilet fix vs replace
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