Before you choose a new kitchen faucet, take a close look at the sink or countertop where it will sit. The number of holes, their spacing and what each one is used for will determine which faucet styles can fit without extra drilling or cover plates. This guide walks you through the common hole configurations and the measurements that matter, drawing on installation documents from several manufacturers.
Count the holes and identify their purpose
Start by looking down at the sink deck or the countertop behind the sink. You may see one, two, three or four holes. Delta’s product overview for its Leland single-handle pull-down faucet notes that the model can be mounted in a one, two, three or four hole sink, with an optional escutcheon included to cover extra openings. A single hole is often used for a faucet with an integrated sprayer. A second hole might hold a side spray, a soap dispenser or a filtered water faucet. A third hole could be for a separate handle on a two-handle faucet, and a fourth hole might serve an air gap for a dishwasher or an additional accessory.
If you are replacing an existing faucet, note what each hole currently holds. That will help you decide whether you need a faucet that matches the same layout or whether you are willing to use a deck plate to cover unused holes.
Common hole configurations and what they fit
Manufacturers design faucets to work with specific hole counts. A single-hole faucet combines the spout and handle in one base. Delta’s Leland pull-down model, for example, can be installed in a single hole, but the included escutcheon allows it to cover a two, three or four hole sink. A two-hole sink often pairs a single-hole faucet with a side spray or a soap dispenser. A three-hole sink is typical for a two-handle faucet with a side spray. Newport Brass’s installation instructions for its bridge kitchen faucet with side spray (model 9452-1) describe a layout where the bridge faucet body uses two holes and the side spray uses a third hole. A four-hole sink can accommodate a two-handle faucet, a side spray and an additional accessory such as a soap dispenser or an air gap.
Moen’s installation sheet for its two-handle kitchen faucet (S713 series) has the faucet body, with its escutcheon, go into the sink openings, and the side spray hose guide go into its own mounting surface hole. For an installation without the side spray, the same sheet supplies a hardware plug that closes the side spray connection inside the faucet body.
Hole size and deck thickness: what the manufacturer sheets say
Hole diameter and the thickness of the sink deck are just as important as the number of holes. Delta’s Leland faucet overview specifies a hole size of 1 3/8 inches and a maximum deck thickness of 2 1/2 inches. Newport Brass recommends a deck hole diameter of 1.25 inches for its bridge faucet and side spray. These numbers come from the specific models shown in the documents, so they are not universal rules. Always check the specifications for the exact faucet you plan to buy.
Deck thickness matters because the mounting hardware needs enough thread to secure the faucet. If your sink is unusually thick, look for a faucet with a longer shank or an extension kit. The Delta document lists a maximum deck thickness of 2 1/2 inches; compare it with your own sink or countertop.
Spacing for two-handle and bridge faucets
Faucets with two handles or a bridge design need the holes to be drilled at a specific center-to-center distance. Newport Brass’s instructions for its bridge faucet state that the center spacing should be between 8 inches and 9 11/16 inches. The side spray hole must be at least 4 3/4 inches away from the nearest faucet mounting hole. If you are installing a bridge faucet, measure the distance between the two outer holes carefully and compare it with the faucet’s requirements.
Covering unused holes with escutcheons and plugs
When a new faucet uses fewer holes than your sink has, you can cover the extras. Delta’s Leland faucet includes an optional escutcheon that spans multiple holes. Moen’s two-handle installation sheet (INS919G) includes a hardware plug for the side spray hole: you remove the faucet body escutcheon, apply a small amount of lubricant to the plug, insert it into the bottom of the faucet body and secure it with a hex wrench. Note that this plug closes the faucet’s side spray outlet; an unused side spray hole in the sink still needs its own cover or accessory. Escutcheons and plug buttons are common accessories, but they are model-specific, so confirm that the faucet you choose comes with the cover you need.
Stainless steel rims and under-mounting support
If your sink has a stainless steel rim, the mounting surface may flex under the weight of the faucet. Newport Brass’s bridge faucet instructions recommend using an under-mounting support, such as a piece of wood cut to the appropriate size and 1/2 inch thick, when mounting to a stainless steel rim. Follow your own faucet’s instructions on support for thin decks.
Always use the manufacturer’s template and specifications
Every faucet model has its own set of measurements and installation steps. The documents from Delta, Moen and Newport Brass all include diagrams and dimensions that are specific to that product. Before you drill any new holes or buy a faucet, download the installation sheet for the exact model you are considering. Compare the required hole size, deck thickness and spacing with your sink. If the faucet comes with a paper template, tape it to the sink deck to visualize the fit. Following the maker’s instructions helps avoid surprises during installation.
Lead-free compliance and local plumbing codes
Kitchen faucets connect to drinking water, so materials must meet safety standards. Delta’s Leland product overview states that the faucet is verified compliant with 0.25% weighted average lead content regulations. This aligns with federal requirements for plumbing fixtures that carry potable water. Local plumbing codes may have additional rules about backflow prevention, air gaps or supply line materials. If you are installing a wall-mount faucet, running new supply lines or doing any work inside walls, it is wise to hire a licensed plumber. For touchless faucets that require electrical connections, always follow the manufacturer’s instructions for GFCI protection and grounding.
Frequently asked questions
Can I install a single-hole faucet in a three-hole sink?
Yes, if the faucet comes with a deck plate or escutcheon that covers the extra holes. Delta’s Leland pull-down faucet, for instance, includes an escutcheon that allows it to be mounted on sinks with one, two, three or four holes. Check that the escutcheon is large enough to span the outer holes of your sink.
What if my sink has a side spray hole but I do not want a side spray?
Two things need closing: the faucet’s side spray connection and the hole in the sink. Moen’s two-handle kitchen faucet installation sheet shows a hardware plug that fits into the faucet body to close off the side spray connection. The open sink hole can take an escutcheon, a hole cover or an accessory such as a soap dispenser.
How do I know if my sink deck is too thick for a new faucet?
Compare the maximum deck thickness listed in the faucet’s specifications with the measured thickness of your sink or countertop. Delta’s Leland model, for example, allows a maximum deck thickness of 2 1/2 inches. If your deck is thicker, look for a faucet with an extended shank or consult the manufacturer for compatibility options.
For more details on matching faucets to sink openings, visit our sink hole configurations category page. You can also explore our installation and compatibility section and the measuring guide for additional help with clearances and fit.
