WOWOW FaucetsQuick Answer
Standard bathroom faucets use three configurations: one hole for single-hole faucets, three holes at 4-inch spacing for centerset, and three holes at 8-inch or wider spacing for widespread faucets. The drilled hole diameter is usually about 1-1/4 to 1-3/8 inches.
Standard Hole Configurations
Single-hole: one opening. Centerset: three openings, 4 inches between the outer two. Widespread: three openings, 8 inches or more between the outer two.
How to Measure Hole Spacing
Measure center-to-center from the left handle hole to the right handle hole. Use that distance to choose between centerset (4 inches) and widespread (8 inches or wider).
Using a Deck Plate
If you want to switch from a three-hole setup to a single-hole faucet, use the included deck plate to cover the unused outer holes.
Typical Drill Size
The individual hole is normally about 1-1/4 to 1-3/8 inches in diameter. Always check the faucet’s mounting instructions before drilling a new hole.
Frequently Asked Questions
What is the standard bathroom faucet hole size?
The drilled hole is typically about 1-1/4 to 1-3/8 inches in diameter. The more important measurement is the spacing between holes.
How do I know if I need centerset or widespread?
Measure the distance between the two outer holes. About 4 inches means centerset; 8 inches or wider means widespread.
Can I install a 1-hole faucet in a 3-hole sink?
Yes, if the single-hole faucet includes a deck plate that covers the two extra holes.
