Match the mounting-hole pattern and center spacing before anything else: measure center-to-center between the outer holes, then confirm spout reach, flow rate, and outlet type.
Buying before measuring is how people end up with a faucet that won’t seat in the deck. Laundry sink drilling isn’t standardized — KOHLER’s own K-6703-3 sink uses three holes on 8-inch centers while the K-6704-3 uses three holes on 4-inch centers, both with 1-3/8-inch faucet-hole diameters. Two sinks from the same maker, two different layouts. Here’s the order that gets it right.
Measure The Sink Before You Shop
Start with the deck, not the catalog. Four numbers decide whether a faucet fits: hole count, center spacing, hole diameter, and deck thickness.
- Count the holes. One hole generally takes a single-handle faucet. Three holes may use separate hot and cold handles plus a spout.
- Measure center spacing. Run the tape from the center of one outer faucet hole to the center of the other. Never measure the outside edges of an escutcheon — that’s a wider number and it will send you to the wrong faucet.
- Check hole diameter and deck thickness. Compare both against the manufacturer’s installation requirements. Common faucet holes run 1-3/8 inches.
- Confirm basin clearance. Compare the published spout reach and height against your sink dimensions so water lands in the basin, not on the backsplash.
Going from three holes to a single-hole faucet needs a compatible deck or an approved escutcheon. Confirm the plate is included before you order.
Spout Reach, Outlet Type, And What Actually Fits The Job
The outlet style decides how you’ll use the sink more than any other feature. KOHLER’s Jolt K-30618 is the plain case: deck-mount, three-hole on 4-inch centers, 7-inch spout reach, 4.0 gallons per minute, two lever handles, ceramic-disc valves. KOHLER’s Simplice K-22035 adds flexibility — a pull-out two-function sprayhead that switches between aerated and Sweep spray on a touch button, 8-inch reach, and 120-degree spout rotation for filling buckets.
A rotating or pull-out spout earns its price on a laundry sink, where containers are wide and awkward. Limit the rotation so water stays inside the basin.
The third option is the Jolt K-30619, which ends in a 3/4-inch garden-hose-thread (GHT) swing spout for attaching a hose or accessory. Treat that thread as a specific standard, not a universal one — GHT is not interchangeable with NPT or other household plumbing threads. Confirm the accessory’s thread and use an approved adapter where required.
| Model | Mounting And Reach | Best For |
|---|---|---|
| KOHLER Jolt K-30618 | Three-hole, 4-inch centers; 7-inch reach | Straightforward washing and filling |
| KOHLER Jolt K-30619 | Three-hole, 4-inch centers; GHT swing spout | Direct hose or accessory attachment |
| KOHLER Simplice K-22035 | Three-hole, 4-inch centers; 8-inch reach; 120° rotation | Rinsing, pretreating, wide containers |
Flow Rate, Connections, And The Traps That Cost Money
Published flow rates only compare when the conditions match. Same number, opposite meaning — one is a ceiling, one is a floor. Read the pressure qualifier before you assume two faucets behave alike, and check local plumbing requirements, splash risk, and sink capacity before choosing a high-flow model.
Then verify supply-line fittings, included valves, deck-plate requirements, and whether the faucet is deck-mounted or wall-mounted. Install according to the manufacturer’s instructions — the KOHLER spec documents direct installers to follow them, which sounds obvious until a retrofit goes sideways. Shut off the water supplies before removal, and check every connection for leaks after installation.
If you’ve measured and you’re ready to narrow the field, our tested laundry room faucet roundup covers models that fit the common configurations. For the full drilling specifics, KOHLER publishes the K-30618 specification sheet with exact dimensions and requirements.
The Mistakes Worth Avoiding
Most returns trace back to four errors. Assuming every utility sink uses 4-inch centers when both 4-inch and 8-inch drilling exist. Measuring escutcheon width instead of hole-center spacing. Buying a three-hole faucet for a single-hole deck without confirming an included plate or adapter. And ignoring spout reach, which puts water near the rim or backsplash no matter how good the faucet is. A two-function sprayhead and a MasterClean sprayface — designed to resist mineral buildup and clean up easily — are worth the upgrade on a sink that sees pretreating and rinsing.
Common Questions
Can A Single-Hole Faucet Go In A Three-Hole Sink?
Sometimes, but not by itself. The faucet needs a compatible deck or an approved escutcheon plate to cover the unused holes, and that plate has to be listed for your hole spacing. Confirm it’s included or available before ordering — buying the faucet first and hunting for the plate second is the usual failure.
Is Garden Hose Thread The Same As Standard Plumbing Thread?
No. A 3/4-inch garden-hose-thread outlet is meant for compatible hose accessories, and it is not interchangeable with NPT or other household plumbing threads. Match the accessory’s thread standard to the faucet and use an approved adapter where the manufacturer requires one.
Does A Higher Flow Rate Always Mean A Better Faucet?
No. A higher number can mean more splash and a sink that can’t keep up. Published figures also differ in meaning — some are maximums at a stated pressure, some are minimums. Check the qualifier and the pressure before comparing, then match the flow to how you actually use the sink.
Sources
- KOHLER. “K-30618 Specification Sheet” Supports the Jolt faucet’s 4-inch centers, 7-inch reach, and 4.0 gpm rating.
- KOHLER. “K-22035 Specification Sheet” Supports the Simplice pull-out sprayhead, 8-inch reach, and 120-degree rotation.