Single-Hole & Centerset (4-Inch) Bathroom Faucets: Spec & Wholesale Sourcing Guide
A B2B spec and sourcing guide to single-hole and 4-inch centerset bathroom faucets — deck holes, spacing, when to spec each, and how to vet a solid-brass OEM/ODM supplier.
On this page
If you are sourcing single-hole & centerset (4-inch) bathroom faucets for a hotel, multifamily, or retail program, the decision between the two configurations comes down to sink-deck drilling, install labor, and which SKUs ship at low trade MOQs. This guide breaks down the deck-mounting differences between single-hole & centerset (4-inch) bathroom faucets, the hole count and spacing of each, and how to evaluate a faucet factory before you commit a purchase order.
SANIKB sources and supplies both configurations as solid-brass faucets and supplies importers, wholesalers and project buyers on an OEM/ODM basis through its faucet OEM and ODM manufacturing program. Below is the spec-grade detail your procurement and specification teams need to standardize a line.
Single-hole vs centerset: the deck-mounting difference
The single most important spec on a lavatory faucet is how many holes it needs in the sink or countertop, and how far apart they sit. This determines which basins, vanity tops, and pre-drilled ceramic sinks the faucet will drop into — and it is the first question your installers and your sink supplier will ask.
Single-hole bathroom faucet
A single-hole basin mixer range mounts through one deck hole, typically 1-3/8" (about 35 mm) in diameter. One lever controls both temperature and flow, and the supply lines and valve cartridge pass through that single opening. Many models include an optional escutcheon (base plate) so the same faucet can also cover a 3-hole deck — flexibility worth confirming on the spec sheet before you order.
Single-hole faucets are the default for modern minimalist vanities, vessel-sink installs, and any spec where install speed matters: fewer holes to drill, fewer connections, faster rough-in.
4-inch centerset bathroom faucet
A 4-inch centerset faucet line is built for a 3-hole deck drilled on 4-inch centers — the outer two holes sit 4 inches (about 102 mm) apart, center to center — 4 in centers, in trade shorthand — with a third hole between them for the spout. Each bore is the standard 1-3/8 in (35 mm) faucet hole, which is the same on centerset, widespread and single-hole decks. On a true centerset, the two handles and the spout share one integrated base, so the unit installs almost as fast as a single-hole while still giving separate hot and cold control.
This is the workhorse format for North American hospitality and multifamily, where basins are commonly pre-drilled 3-hole on 4-inch centers and operators want two-handle operation. Do not confuse centerset with widespread: widespread faucets use independent pieces on 8-inch (or adjustable 6–16") centers and are a different SKU and install entirely (covered in the related widespread hole-spacing spec below).
Hole count, spacing and compatibility
Use this as a quick compatibility reference when matching faucets to the basins and vanity tops already in your program. Always cross-check against the printed spec sheet of the specific SKU, since base-plate options can change effective hole compatibility.
| Configuration | Deck holes | Spacing (center to center) | Handles | When to spec it |
|---|---|---|---|---|
| Single-hole | 1 (often base-plate optional for 3-hole) | n/a (single ~1-3/8" / 35 mm opening) | Single lever | Contemporary multifamily & boutique hospitality; fastest rough-in |
| 4-inch centerset | 3 | 4" (102 mm) between outer holes | Two handles on one integrated base | Standard pre-drilled 3-hole hospitality & retail replacement |
| Widespread (for contrast) | 3 | 8" standard / 6–16" adjustable | Two independent handles, separate spout | Premium / larger vanity tops — different SKU |
Live single-hole and centerset SKUs you can pull spec sheets for and reference by code in an RFQ:
- single-hole basin faucet F300001 — one-hole deck mount, single lever
- single-hole basin mixer F360001 — minimalist body for modern vanities
- single-hole lavatory faucet F396001 — tall-spout option for vessel sinks
- centerset two-handle faucet F305301 — 3-hole, 4-inch centers
- centerset basin mixer F405001 — two-handle 4-inch deck mount
Single-hole basin faucet F300001 — one deck hole, single-lever control.
Centerset two-handle faucet F305301 — 3-hole deck on 4-inch centers.
When to spec single-hole vs centerset by project type
Both formats are inexpensive to install and easy to maintain, so the decision is usually driven by the basins already in the building and the look the project owner wants.
- Hospitality (hotels, resorts): If the property uses pre-drilled 3-hole vanity basins, a 4-inch centerset is the path of least resistance and reads as a familiar, premium two-handle fixture. Where the brief is contemporary and basins are single-drilled, single-hole faucets cut install time across hundreds of rooms.
- Multifamily / build-to-rent: Single-hole faucets win on per-unit labor and parts count at scale. Fewer connections means fewer warranty callbacks, and standardizing one finish across the building simplifies your reorder line.
- Retail / distribution: Stock both. Single-hole covers the modern-vanity shopper; 4-inch centerset covers replacement demand for the huge installed base of 3-hole sinks. Two or three finishes across both configurations covers most sell-through.
Whichever you spec, you can hold one supplier and one quality standard across both formats by sourcing both configurations from the same bathroom faucet manufacturing range.
Solid-brass construction: why the faucet body matters for projects
Every SANIKB lavatory faucet — single-hole and centerset alike — is built on a solid-brass body, not zinc alloy. For a sourcing buyer this is the spec that protects you on the back end: brass resists dezincification and stress-corrosion cracking far better than the zinc-alloy castings common in cheap retail faucets, which is what drives warranty returns and cracked bodies in hard-water markets. The Copper Development Association documents how dezincification-resistant brass holds up where high-zinc alloys fail.
Brass also threads and machines cleanly, so valve seats and supply connections stay tight over thousands of cycles. When you are putting a fixture into hundreds of hotel rooms or rental units, the body material is the difference between a one-time install and a stream of callbacks. Internally, look for a ceramic-disc cartridge and a braided supply hose, and ask any supplier — including us — to confirm cartridge type and wetted-component materials on the spec sheet for each model.
Lead-free wetted components matter just as much for North American sales: faucets sold there must meet the low-lead requirements behind NSF/ANSI 61 and 372, so confirm which models already carry the marks your destination market enforces.
Finish and size options
Finish standardization is where a lot of project margin is won or lost. SANIKB lavatory faucets are produced in the core architectural finishes buyers actually order, so you can hold one finish story across single-hole and centerset within the same program. For pairing finishes to market positioning and reorder consistency, the faucet finishes guide for wholesale buyers goes deeper than we will here.
| Finish | Common use case |
|---|---|
| Chrome | Highest-volume, neutral hospitality and rental standard |
| Brushed nickel | Warm, fingerprint-tolerant; mid-to-upper residential and hotel |
| Matte black | Contemporary briefs; pairs with modern single-hole bodies |
| Black & chrome | Two-tone accent for design-led retail and boutique projects |
Brushed gold and other PVD tones can be quoted on request — flag the finish in your RFQ and we will confirm availability and minimums per model.
How to evaluate a single-hole and centerset faucet supplier
Spec is only half the job; the supplier behind the SKU determines whether your program runs on time. Before you place a purchase order, work through this checklist:
- Body material, verified: Confirm solid brass on the printed spec sheet, not just in the sales pitch. This is the number-one source of field failures.
- Certification support for your market: Ask which marks the model actually carries. For the US and Canada that is the cUPC listing and the NSF/ANSI/CAN 372 lead-free test. Bathroom faucets can add WaterSense, which needs 1.5 gpm at 60 psi. Get it model by model, not as a blanket claim.
- OEM / ODM capability: If you need your own brand, a logo on the lever, custom packaging, or a tweaked spout height, confirm the factory does true OEM/ODM. The related OEM and private-label manufacturing guide below walks through the tooling and artwork process.
- Finish consistency across reorders: Request finish reference samples and confirm the factory can hold the same chrome or matte-black batch to batch.
- Trade terms: Confirm low trade MOQs for new accounts, current lead times, and export packaging for your shipping mode — get these in writing rather than assuming.
- Single-source breadth: A supplier producing single-hole, centerset, and matching kitchen and shower faucets lets you consolidate fixture sourcing under one quality standard and one set of trade terms.
Frequently asked questions
What is the difference between a single-hole and a 4-inch centerset bathroom faucet?
A single-hole faucet mounts through one ~1-3/8" (35 mm) deck hole with a single lever, while a 4-inch centerset mounts on a 3-hole deck with the outer holes 4 inches (about 102 mm) apart and two handles on one integrated base. Pick the format that matches the basins already drilled in your project.
What is the minimum order quantity for wholesale bathroom faucets?
SANIKB supports low trade MOQs for new accounts so you can validate a model before scaling. Send your target SKUs and finishes and we will quote the current minimum per model in your RFQ.
What are the lead times for a faucet order?
Lead times depend on configuration, finish, OEM packaging, and order size. Request current lead times with your model list and destination market and we will confirm production and shipping windows in writing.
Do you offer OEM and private-label faucets?
Yes. We supply single-hole and centerset faucets on an OEM/ODM basis — your brand, lever logo, custom packaging, and spout-height tweaks are supported. See the OEM and private-label manufacturing guide for the tooling and artwork process.
Which certifications can you support?
We can support the marks your market enforces. That is the cUPC listing, and on bathroom faucets the WaterSense flow rate of 1.5 gpm at 60 psi. Lead-free parts are made to the 0.25% limit that NSF/ANSI/CAN 372 tests for; confirm the exact marks your country enforces and we will tell you which models already carry them.
What finishes are available, and can I get samples?
Core finishes are chrome, brushed nickel, matte black, and black & chrome, with brushed gold and other PVD tones quotable on request. Request finish reference samples before a bulk order so you can lock the batch standard for reorders.
Related sourcing guides
- Faucet manufacturer and wholesale supplier guide — the pillar on factory audits, QC and trade terms
- Bathroom basin faucet supplier and factory guide — the adjacent basin-mixer category
- Widespread bathroom faucet hole-spacing spec — the 8-inch / 3-hole format
- OEM and private-label faucet manufacturing — branding, tooling and packaging
References
- U.S. EPA WaterSense — water-efficiency specification and labeling program.
- NSF/ANSI 61 and 372 — drinking-water system components and lead-content standards.
- Copper Development Association — brass alloys and dezincification resistance reference.
Request a wholesale quote
SANIKB sources and supplies solid-brass single-hole & centerset bathroom faucets and supplies importers, wholesalers and project buyers on an OEM/ODM basis. Send your target models, finishes, MOQ and destination market and our team will reply with current lead times and packaging options.
Browse single-hole & centerset bathroom faucets → Request a wholesale quote →
Bulk & Project Sourcing: Single-Hole Faucets for Multifamily and Hotels
Beyond the single fixture, multifamily developers and hotel procurement teams source these faucets by the pallet, where unit economics, lead time and consistency across a whole property outrank any single styling choice. When you are quoting single-hole bathroom faucets for projects at building scale, three numbers drive the purchase order: per-unit MOQ, production lead time, and how many rooms or doors a single batch has to outfit without a finish or cartridge mismatch.
For bulk bathroom faucets for multifamily and commercial bathroom faucets for hotel guestrooms, here is the project-buyer frame we work to:
- MOQ for new accounts: low trade minimums let a developer pilot one model across a single floor or model unit before committing the full building; we quote the exact per-model minimum against your door count in the RFQ.
- Lead time by program size: a 50-room boutique refit and a 400-door build-to-rent tower carry different production and freight windows; send the unit count and target handover date and we confirm the schedule in writing.
- Bulk specs that scale: one cartridge type, one flow rate and one finish batch held across the whole order keeps guestroom-to-guestroom feel identical and shrinks the spare-parts kit your maintenance team has to stock.
- Guestroom-ready use case: single-lever operation, vandal-tolerant handles and a low-flow aerator suit high-turnover hospitality where speed of use and water budgets both matter, confirmed per model and market.
- Phased delivery for staged construction: large multifamily and hotel programs rarely finish every floor at once, so we can split a bulk order into scheduled releases that follow your trade sequence rather than landing one oversized container before the building is ready to install.
If you are new to ordering at volume, our wholesale faucet guide for importers and distributors walks through trade terms, container loading and reorder discipline, and a project-grade reference unit such as the FYF-01079 solid-brass basin faucet shows the build standard you can specify line-wide.
Ready to price a building? Request a quote with your door count, finishes and destination market, and we will return per-unit MOQ, lead time and packaging.