Toilet Tank Holes
Tank Lid Hole
- Some tank lids have a hole located on the back right corner. This is not a defect.
- In manufacturing, the hole is used to drain the slip during the casting process.
Tank Hole
- Some toilet tanks may have a hole near the top of the tank.
- The hole is an intentional part of the tank design which provides ventilation to prevent condensation.
Toilet Bowl Holes
Rim Hole
- Certain toilet bowls have a small “frost” hole located in the front of the bowl just below the rim.
- The hole allows residual water from water-leak testing to exit the siphon jet chamber.
- The toilet bowls are stored upside down to ensure water drainage prior to shipment.
- In cold weather, the frost hole prevents water from freezing inside the bowl.
Trapway Hole
- Some toilets contain a hole in the trapway area behind the bowl.
- This hole is part of the design aesthetic of the toilet.
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