Bathroom faucets are not universal. The faucet has to match the holes already drilled in the sink or vanity top, and that is decided by two numbers: how many holes there are, and how far apart they are.
How to measure
Measure from the centre of the outermost hole to the centre of the other outermost hole. Not the edges, and not the gap between them. Then count the holes. Those two figures determine everything.
The configurations
Single-hole
One hole. The faucet body and handle are a single unit. Common on modern vanities and small basins, and the simplest to install because there is only one connection point to seal. Some single-hole faucets ship with an optional deck plate so they can also be fitted to a three-hole top.
Centerset — 4 inches
Three holes, 4 inches between the outer two. The faucet is one piece: spout and handles mounted on a shared base that covers all three holes. This is the most common layout in North American bathrooms, particularly on standard drop-in basins. Both single-handle and two-handle centerset faucets exist — the handle count is independent of the hole spacing.
Widespread — 8 inches
Three holes, typically 8 inches between the outer two, though the range runs roughly 6 to 16 inches. The spout and the two handles are separate components connected below the deck. It gives a more substantial look and suits wider vanity tops. Our Banbury WS84924SRN covers an 8 to 16 inch spread.
Wall-mounted
No deck holes at all — the faucet comes out of the wall, and the supply lines are inside it. Changing to or from wall-mounted is a plumbing job, not a swap.
What you can and cannot change
- Single-hole faucet into a 4-inch three-hole top: usually possible with a deck plate. Check the listing for whether one is included.
- Centerset into a widespread top: no. The centerset base is not wide enough to reach the outer holes.
- Widespread into a centerset top: no. The components are designed to sit further apart than the holes allow.
- Changing hole count or spacing: means a new sink or vanity top. Drilling porcelain or stone is not a practical DIY job.
Spout height and reach
Once the mounting is settled, the remaining choice is the spout. High-arc spouts give more clearance for washing hands and filling containers, but can splash in a shallow basin. Low-arc spouts suit compact spaces and shallow bowls. Product pages list spout height and reach where the manufacturer publishes them.
Browse the full range in bathroom faucets, or see how to identify your existing faucet if you are matching something already installed.