Widespread (8-Inch) Bathroom Faucet Hole Spacing: Spec & Sourcing Guide

Quick answer: A widespread bathroom faucet uses 8-inch (203 mm) hole spacing — three separate deck holes for the hot handle, spout and cold handle, measured center-to-center between the two outer holes — what the trade calls 8 in centers, or 8 in O.C. (adjustable models cover a 6–16 in / 152–406 mm range). See the full spec table below, or browse our widespread and centerset bathroom faucets.

If you are sourcing a widespread (8-inch) bathroom faucet for a hotel program, a distribution catalog or a multi-unit project, the first thing to confirm is hole spacing. A widespread bathroom faucet hole spacing layout is a three-hole pattern, and that deck will not accept a faucet drilled for a single hole or a 4-inch centerset spread. This page is a spec-first reference: it leads with the hole-spacing and dimension table you need to match a faucet to a basin, then covers solid-brass construction, finishes, OEM/ODM and how to qualify a supplier before you place a wholesale order.

Widespread bathroom faucet hole spacing: the spec table

A widespread faucet splits into three separate pieces — a spout plus two independent handles — joined under the deck by flexible supply lines. Because the handles are not tied to the spout body, the spread is adjustable within a range, which is why specifiers default to widespread for larger vanities and three-hole drilled basins. The buyer question this section answers: will this faucet drop into the deck my customer already has?

Two more numbers to capture before you quote: deck depth (the basin or counter thickness the mounting hardware must clear, commonly accommodated up to roughly 50 mm) and supply-line connection (3/8 in female compression is the usual convention on deck-mount basin faucets). The single rule that prevents the most returns: a 3-hole widespread deck and a 4-inch centerset are not interchangeable, and neither accepts the other without re-drilling or a deck plate. Always capture the buyer's existing basin drilling first. For the adjacent formats, our single-hole and centerset bathroom faucet guide covers those dimensions in the same depth.

What makes the widespread layout distinct on the rough-in is that the spread is defined by three independent bores, not by a fixed base plate. The 8-inch figure is a nominal class name, not a single locked dimension: the working range is governed by the length of the under-deck supply hoses that bridge each handle to the spout, which is why the same model can serve a basin drilled at 8 inches and one drilled wider on a stone double-vanity. When you collect a buyer's drilling you need three things, not one — the outer-to-outer spread, the diameter of each bore (almost always around 35 mm), and the deck thickness the shanks have to pass through. Thick stone or layered countertop decks are the most common field surprise: a faucet shank and mounting nut sized for a 25–35 mm basin wall may not seat cleanly through a 50 mm stone slab, so the deck-depth number belongs on the spec sheet next to the spread. Confirming all three up front is what keeps a widespread order from arriving correct on paper but un-installable on site.

Why specifiers choose an 8-inch widespread faucet

The widespread format earns its place on the spec sheet for practical reasons that matter to importers and project buyers, not just aesthetics:

• Deck flexibility. Because the handles mount independently of the spout, the spread adapts across a range of three-hole basin drillings rather than locking to one fixed dimension — one SKU can cover several drilling specs in a mixed catalog.
• Serviceability. Three separate components mean a single handle cartridge or the spout can be serviced without pulling the whole assembly — relevant for hospitality and property-management accounts that maintain fixtures for years.
• Specification fit. Larger and double vanities read as under-furnished with a compact centerset; the wider spread is the expected look for mid-to-upper hospitality and residential project tiers, and the proportions suit the deeper, longer countertops those projects use.
• Mixed programs. Buyers often run widespread on primary baths and single-hole on powder rooms — sourcing both from one brass line keeps finishes and warranty terms consistent across the project.

The match to larger and luxury vanities is not only visual. A wide spread puts each handle within a natural reach on a deep counter, keeps the spout centered over a larger or off-center basin, and gives the hot and cold controls enough separation that they are unambiguous to a guest who has never used that fixture before — a small thing that matters across hundreds of identical hotel keys. On a 4-inch centerset all three points crowd together at the back of a generous deck and the fixture looks lost; the widespread reads as deliberate. That is why specifiers treat widespread as the default for primary and master baths and reserve centerset and single-hole formats for compact or secondary positions rather than the other way around.

Project and channel use-cases

Where a widespread program actually lands tells you how to scope the order — finish mix, packaging, certification and replacement-part stocking all follow from the channel:

• Hospitality. Mid-to-upper hotel and resort fit-outs specify widespread for primary baths because the wider proportions match the deck sizes those rooms use and the three-piece build lets housekeeping and maintenance replace a worn cartridge in place instead of pulling the whole faucet. Expect repeatable finishes across many keys and a need for replacement-part continuity over the life of the property.
• Multifamily and build-to-rent. Developers and contractors buying for apartment and condo programs value the solid-brass body for its service life under heavy tenant use and the ability to standardize one finish across an entire building. Volume and predictable lead times usually outrank custom styling here.
• Mid-to-high-end retail and distribution. Importers stocking a catalog or showroom use widespread as the step-up line above centerset, often carried in two or three finishes to cover the palettes their customers ask for. Neutral or private-label packaging and a clean assortment story matter more than they do on a closed project order.

Inside a solid-brass widespread faucet body

The job here is verifying that what you put on a PO will survive a fit-out. Every SANIKB widespread faucet is built on a solid brass body — the line specifiers should hold any supplier to, because the failure mode behind warranty claims and chargebacks on cheap retail faucets is a zinc-alloy (zamak) body that corrodes and cracks under sustained pressure. Brass also resists dezincification when alloyed and finished correctly; the Copper Development Association is a useful primer on why brass is the professional default for water fixtures.

When you evaluate a widespread faucet for a wholesale order, confirm these points in writing on the spec sheet:

• Body material: solid brass (not zinc/zamak, not a brass-plated shell over alloy).
• Cartridge: ceramic-disc cartridge for handle longevity and drip resistance — ask for the cartridge spec and replacement-part availability.
• Supply connections: 3/8 in female compression on the included flexible hoses that link the three pieces under the deck.
• Lead-free parts: ask for the lead-free paperwork. The US rule caps lead at 0.25% across the wetted surfaces, and NSF/ANSI/CAN 372 is the test that proves it.
• The listing: ask for the cUPC listing, not a general "certified" claim. cUPC means IAPMO has listed that faucet to the US and Canada faucet standard, ASME A112.18.1/CSA B125.1.
• Flow, if the job asks for it: a bathroom faucet needs 1.5 gpm at 60 psi to carry the WaterSense label. Check which of these each model has before you place the PO.

Finishes and matching formats for wholesale orders

Finish is usually the variable that decides whether a faucet fits a project palette. The SANIKB brass range carries the finishes specifiers ask for most — and the same finish can be carried across widespread, centerset and single-hole formats so a buyer specs one consistent look across an entire bath program. Gold and brushed gold are available on request; confirm per model.

Finish durability and application method affect how a fixture holds up to commercial cleaning regimes — our faucet finishes guide for wholesale buyers breaks down each option and where it fits. To compare live models and the current assortment, browse the widespread bathroom faucet collection; the full bathroom faucet range is the parent category, and buyers comparing footprints often pair it with the single-hole bathroom faucet range for secondary baths.

One point specific to a three-piece set: because a spout and two handles are finished as separate castings, a credible supplier has to control finish consistency across the three components in the same box, not just from unit to unit. A barely-off plating batch shows up as a spout that reads slightly warmer than its handles on the same deck — a defect a buyer only notices after install. Ask how the factory batches and matches finish across the three pieces of a single set; it is one of the clearer tells that separates a faucet maker from an assembler.

Two representative widespread models to reference when you build a quote:

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  Solid-brass widespread basin faucet F305201 — three-piece deck mount with two handles.

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  Brass widespread basin faucet F309001 — independent handles on an adjustable three-hole spread.

OEM / ODM widespread faucets for importers

SANIKB is a B2B manufacturer, not a retail brand. For a widespread program you can take a catalog model as-is or specify your own finish set, handle style, packaging and branding for a private-label run — the route importers and wholesalers use to put a differentiated 8-inch widespread line under their own name while keeping the solid-brass construction underneath. Our OEM and private-label faucet manufacturing guide walks through the full process; typical scope on a widespread order:

• Finish selection and custom finish development for the destination-market palette.
• Handle and spout styling within the widespread platform.
• Private-label / neutral packaging, barcoding and manuals in your market's language.
• Certification support aligned to where the goods ship.

A three-piece widespread carries a few OEM details a single-body faucet does not. Because the set ships as a spout, two handles and the connecting hoses, the packaging has to keep the three components together, protected and clearly kitted — a missing handle or a hose left out turns into a customer-service problem at the far end of the supply chain, so cartoning and the included-parts checklist deserve sign-off, not just the artwork. Styling within the platform also runs across both handles at once: a custom lever or cross-handle has to be developed as a matched pair so the two sides are mirror-identical, and any handle change has to keep the same valve and cartridge underneath so service parts stay common across your line. Settling these on the first private-label run is what keeps a widespread program consistent as it scales.

Chrome Curved-Spout Widespread Bathroom Faucet, Dual Lever HandlesGet a quote

How to qualify a widespread faucet supplier

Before you commit a purchase order, run the supplier through a short technical checklist. A serious manufacturer answers all of these without hesitation:

• Material proof: written confirmation of solid-brass bodies, not plated zinc.
• Hole-spacing spec: the exact three-hole spread range for each model so it matches the buyer's basin drilling.
• Cartridge and parts: ceramic-disc cartridge spec plus replacement-part availability for the field.
• Certification path: which marks they support for your destination — for water-efficiency claims, look for products listed under the EPA WaterSense program where your market values it.
• Trade terms: low trade MOQs for new accounts, sample policy, packaging options and current lead times — request these per model rather than assuming a fixed number.
• Range coverage: whether they can supply matching centerset and single-hole formats in the same finish for a complete bath program.

A three-piece widespread set is also worth a few checks a single-hole faucet would never trigger, because there are two handles and two valve bodies instead of one. Ask specifically about:

• Valve and cartridge consistency across both handles. Both sides should use the identical cartridge and valve body so the hot and cold controls feel the same in the hand and a single replacement part covers either side. A supplier that mixes cartridges between the two handles is assembling from parts bins, not building to a platform.
• Matched finishing across the set. The spout and both handles should be plated and inspected as a unit so the three pieces in one box read as one finish — confirm they batch and QC the set together, not as loose components pooled from different runs.
• Three-piece packaging integrity. Confirm how the spout, two handles and connecting hoses are kitted and protected in the carton, and that an included-parts list ships in the box, so nothing arrives short on a multi-unit order.

For the full vendor-evaluation framework — factory capability, QC, certification and trade terms — see our faucet manufacturer and wholesale supplier guide, the pillar that anchors this cluster.

Frequently asked questions

What is the standard hole spacing for a widespread bathroom faucet?

A widespread faucet uses three separate deck holes (each roughly 35 mm / 1-3/8 inch in diameter) with an adjustable outer-to-outer spread. 8 in (203 mm) is the nominal size — the trade calls it 8 in centers — and most models accommodate roughly 6–16 in (152–406 mm). Confirm the exact working range per model, because it varies by platform.

Can a widespread faucet replace a 4-inch centerset?

Not directly. A centerset is a fixed 4-inch (about 102 mm) three-hole layout on a single base plate, while a widespread mounts as three independent pieces across a wider, adjustable spread. The two are not interchangeable without re-drilling or a matching deck plate, so always capture the existing basin drilling first. If the deck is already drilled on 4 in centers, the options are a centerset or a single-hole faucet with a deck plate — not an 8 in widespread.

What is the MOQ and lead time for a wholesale order?

SANIKB offers low trade MOQs for new accounts; quantities and lead times depend on model, finish and whether the order is private-label. Send your target models and destination market and we will return current lead times with your quote.

Do you offer OEM / private-label widespread faucets?

Yes. You can run a catalog model as-is or specify finishes, handle styling, packaging and branding for a private-label program on the same solid-brass platform. See our OEM and private-label manufacturing guide for the full process.

Which certifications can you support?

For the US and Canada, three things decide a basin faucet. The cUPC listing, which means IAPMO listed it to the faucet standard ASME A112.18.1/CSA B125.1. The lead-free test, NSF/ANSI/CAN 372. And on bathroom faucets, a flow rate of 1.5 gpm at 60 psi if the job wants WaterSense. We confirm which ones each model has before you place the PO.

Can I get the same finish across widespread, centerset and single-hole formats?

Yes — carrying one finish across all three formats from a single brass line is exactly how buyers keep a bath program visually consistent. Request a finish-matched set when you send your model list.

Related sourcing guides

• Faucet manufacturer and wholesale supplier guide (pillar)
• Single-hole and centerset bathroom faucet sizing guide
• Bathroom basin faucet supplier and factory guide
• Faucet finishes guide for wholesale buyers
• OEM and private-label faucet manufacturing guide

References

• NSF/ANSI 61 & 372 — drinking-water system components and lead-free requirements
• U.S. EPA WaterSense program
• Copper Development Association — brass and dezincification reference

Request a wholesale quote

SANIKB sources and supplies solid-brass widespread bathroom faucets to 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 widespread bathroom faucets → Request a wholesale quote →