WOWOW FaucetsQuick Answer: What Is a 4-Hole Kitchen Faucet?
A 4-hole kitchen faucet is a deck-mount setup that uses four mounting holes: two for the hot and cold handles, one for the main spout, and one for a side sprayer, soap dispenser, or filtered water dispenser. It is common on traditional and farmhouse-style kitchens.
What Is a 4 Hole Kitchen Faucet?
A 4-hole kitchen faucet works like a 3-hole faucet, with the spout installed in the center and the two handles on the outer holes. The fourth hole adds versatility: it usually holds a side sprayer, soap dispenser, filtered water dispenser, or dishwasher air gap. Pull-out spouts and separate side sprayers are the two most common additions.
The standard spacing is 8 inches from the center of the far-left hole to the center of the far-right hole, with about 4 inches between adjacent holes. This 8-inch widespread layout is what makes most 4-hole faucets interchangeable during a replacement.
How to Install a 4-Hole Kitchen Faucet
Before you start, gather a basin wrench or pliers, two adjustable wrenches, a utility knife, a putty knife, plumber’s putty, a flashlight, and a towel or bucket for water. Then follow the steps below.
Step 1: Turn Off the Water Supply
Close the shut-off valves under the sink, or use the main house valve if needed. Open the old faucet to release any remaining pressure.
Step 2: Prepare the Mounting Holes
If the flange is not already assembled, screw it to the bottom of each handle. Apply plumber’s putty to the underside, insert the assembly into the holes, then secure the lock nuts and washers underneath and tighten.
Step 3: Assemble the Spray Hose and Sprayer
Screw the sprayer nozzle onto the larger end of the spray hose. Do not overtighten, or the sprayer may be hard to operate.
Step 4: Feed the Spray Hose Through
Screw the smaller end of the spray hose into the handle from above, pass the hose through the mounting hole, and set the sprayer in its holder.
Step 5: Connect the Spray Hose to the Diverter
Under the sink, remove the trap lid if present, then screw the hex nut end of the hose onto the diverter or manifold. Pull gently to confirm it is seated.
Step 6: Turn the Water Back On and Test
Turn the water on slowly, run the faucet and side sprayer at different pressures, and check every connection under the sink for leaks.
4-Hole Kitchen Faucet Replacement: What to Look For
If you are replacing an existing 4-hole kitchen faucet, most use the standard 8-inch widespread spacing, so you usually have plenty of options. Measure the distance between the centers of the two outer holes before you buy.
Look for a faucet that comes with the matching deck plate or escutcheon, because a 4-hole sink often includes extra holes for the side sprayer, soap dispenser, or air gap. A complete kit with the faucet, side sprayer, and deck plate makes the replacement much easier.
You can also install a single-handle faucet on a 4-hole sink by using an oversized deck plate to cover the extra holes. This is a popular choice for a cleaner, more modern look without replacing the sink.
More 4-Hole Kitchen Faucet FAQs
Can I put a 4-hole kitchen faucet on a 3-hole sink?
Usually not without drilling a new hole. A 4-hole configuration needs all four holes unless you cap one with a deck plate or cover.
What is the difference between a 3-hole and 4-hole kitchen faucet?
A 3-hole faucet typically has a spout and two handles, while a 4-hole faucet adds a separate side sprayer, soap dispenser, or filtered water dispenser.
What goes in the fourth hole of a 4-hole kitchen faucet?
The fourth hole is usually for a side sprayer, a soap dispenser, a filtered water dispenser, or a dishwasher air gap.
Do I need a 4-hole faucet for a 4-hole sink?
No. You can cover the unused holes with a deck plate or escutcheon and install a 1-hole or 3-hole faucet for a cleaner look.
What is the standard 4-hole kitchen faucet spacing?
A standard 4-hole layout is 8 inches from the center of the far-left hole to the center of the far-right hole, with about 4 inches between adjacent holes.
Can I replace a 4-hole kitchen faucet with a single-hole faucet?
Yes. Use an oversized deck plate to cover the extra holes, then install a single-handle faucet for a cleaner, more modern look.
Shop 4-Hole Kitchen Faucets
See our 4-hole kitchen faucets buying guide to compare finishes and prices.
