What Size Hole is Needed to Install 3 inch and 1-1/2 inch Toilet Grommets
Updated 03/26/2026 | Published 05/09/2021
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Question:
What size hole do you need to drill for the 3inch grommet and what size hole do you need to drill for the 1.5inch grommet so that it fits exactly? Thank you
asked by: Eddy W
0
Expert Reply:
To install the 3 inch grommet part # F02-2106 you'd need to drill a hole that is 3-3/4 inches in diameter. The 1-1/2 inch grommet part # F02-2105 requires a 2-1/4 inch diameter hole.
expert reply by:
Jameson C
0
Product Page this Question was Asked From
Replacement Rubber Grommet for RV Black Water Tanks - 3" Inner Diameter
- Accessories and Parts
- RV Toilet
- Tank Grommets
- 3 Inch Diameter
- Valterra
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Steve O.
3/26/2026
Your expert is wrong. Assuming these grommets are ICON or a copy, for a 1.5" grommet use a 2 I/4" holesaw. For a 3" grommet use need a 3 3/4" holesaw.