Most pedestal sink returns are not defects. They are mismatches: a drain that does not fit the hole, a pop-up meant for an overflow on a basin that has none, a faucet spaced for a three-hole deck on a basin drilled for one. This guide covers the dimensions and combinations that actually matter so you order once and install without a second shipment.
Start with the drain hole
The drain hole is the first thing to check, and the numbers differ by market.
| Spec | Common value | Notes |
|---|---|---|
| Drain hole diameter | 45 mm | Standard on our basins |
| US drain connection | 1.75 in (≈44.5 mm) | Matches a 45 mm hole with standard hardware |
| Overflow present? | No on most pedestal basins | See overflow section below |
Our pedestal basins use a 45 mm drain opening, which lines up with the US 1.75-inch drain standard using standard lavatory drain hardware. If a listing quotes a different hole size, confirm it before you buy the drain — a 35 mm or 40 mm hole needs different hardware and will not seat a 1.75-inch drain properly.
Overflow vs non-overflow: the mistake that floods a cabinet
Many pedestal basins, ours included, are made without an overflow channel. That is a design choice — a pedestal has no cabinet to protect, and a clean basin face looks better without the overflow lip. But it changes the drain you need.
- A standard pop-up drain is built for a basin with an overflow. Its body has an open path that lets water slip from the overflow into the drain. On a no-overflow basin, that open path is just a leak route if the top seal is less than perfect.
- A non-overflow (overflow-free) drain seals the basin fully at the top and is the correct part for a no-overflow basin.
Rule: if your basin has no overflow, order a non-overflow drain. Putting an overflow drain on a no-overflow basin is the most common way people end up with a slow, seeping mess they blame on the sink.
Check the product listing for "with overflow" or "without overflow" before you add a drain to the cart. If the listing is silent, assume no overflow until you confirm — and ask.
Faucet holes: spacing and count
Pedestal basins are drilled one of three ways:
- Single hole (monoblock) — one hole, centered. Takes a single-handle or monoblock faucet. Simplest and most common on our line.
- Center-set (3-hole, 4 in) — three holes on roughly 4-inch (102 mm) centers. Takes a center-set or mini-widespread faucet.
- Widespread (3-hole, 8 in) — three holes on roughly 8-inch (203 mm) centers. Takes a widespread faucet.
You cannot put a widespread faucet on a single-hole basin, and you cannot drop a monoblock into a 3-hole deck without a deck plate (and even then, only if the plate covers the holes cleanly). Match the faucet type to the drill pattern on the basin you ordered.
A note specific to pedestals: because the column hides the supply lines and the trap, a wall-mounted or deck-mounted faucet both work, but the faucet must reach the basin. On a shallow or sculpted basin, check the spout reach — a faucet with too short a reach dumps water at the rim; too long, and it splashes the floor. Reach is listed in the faucet spec; compare it to the basin width before buying.
Supply lines and the pedestal column
The column of a full pedestal hides the P-trap and the supply stops, which is part of the appeal. Two practical points:
- Access: the supply shut-offs sit behind the column. Make sure there is a removable access or enough clearance to reach the stops without pulling the basin. Some installs add an access panel in the wall behind.
- Rough-in height: the wall outlet for supplies and the drain must land where the basin's back shroud covers them. Confirm the basin's rough-in dimensions against your wall before the plumber sets the stops.
This is the step most often skipped on a first install and most often regretted.
The five mistakes people make
- Buying an overflow drain for a no-overflow basin. Covered above — order the non-overflow part.
- Assuming all drain holes are 1.75 in. They are not. Confirm 45 mm / 1.75 in on the listing.
- Mismatching faucet holes. Three-hole deck, three-hole faucet; single hole, monoblock. No guessing.
- Ignoring spout reach. Measure basin width; match the faucet reach.
- Forgetting the pop-up rod. A lift-rod popup needs the basin's rear hole (on 3-hole decks) or a compatible mechanism. On a single-hole basin, a clicker (push) drain avoids the rod entirely — simpler, fewer parts.
The pattern behind all five: the basin and the hardware are bought separately and assumed compatible. They are not automatically so. Spend five minutes on the hole size, the overflow question, and the drill pattern, and the install is a half-day instead of a second shipment.
What we sell and what we do not
Our site lists the pedestal basins as single-variant products. We do not sell drains, faucets, or supply lines on the site. That is deliberate: hardware is a regional and code question (trap type, supply thread, local plumbing rules), and you are better served by a local plumbing supplier who stocks the correct parts for your jurisdiction.
So this guide is not a pitch for our accessories — there are none in the catalog. It is the checklist to take to your plumber or hardware store so you come home with the right drain and faucet the first time. If you need help confirming the hole size or drill pattern on a specific basin before you buy hardware, ask us and we will point to the exact spec.
Australia and Singapore: waste outlet and tapware rules
If you are buying for Australia or Singapore, the basin body is the easy part — the fittings are where the rules bite.
- Australia: the basin body itself sits outside WaterMark (ABCB Schedule of Excluded Products). The waste outlet and tapware are the regulated parts — tapware must be WaterMark certified, and any fitting that contacts drinking water must also meet AS/NZS 4020. Practically: a licensed Australian plumber may not install an uncertified waste outlet, so source that part locally.
- Singapore: basin bodies are outside the PUB MWELS mandatory list, but basin tapware is regulated — it must be registered with PUB and meet the MWELS rating requirement (2-tick or better for basin taps). Water fittings that are not registered may not be advertised or sold.
We supply the basin, and our first order includes the waste outlet as a gift — but we do not claim WaterMark or PUB registration for it. Confirm the fitting against your local rule before it goes on the wall; that is a short check that avoids a failed inspection.
Frequently asked questions
What size drain do I need for a 45 mm basin? A standard 1.75-inch (44.5 mm) lavatory drain seats in a 45 mm hole with normal hardware. Confirm the hole is 45 mm on the listing first.
My basin has no overflow. Which drain? A non-overflow (overflow-free) drain. Do not use a standard overflow pop-up on a no-overflow basin.
Can I use a widespread faucet on a single-hole pedestal? Not directly. A single-hole basin takes a monoblock faucet. A widespread needs a 3-hole deck. Match the faucet to the drill pattern.
Why does spout reach matter on a pedestal? The column sits close to the wall, so the water lands in a narrow basin. Too-short reach hits the rim; too-long reach splashes past the bowl. Match reach to basin width.
Do you sell faucets and drains? No. Our basins are single-variant products; hardware is not in the catalog. We will confirm hole size and drill pattern so you can buy the right parts locally.
Confirm the spec, then buy the hardware
Before you order a drain or faucet, confirm the exact hole size and drill pattern for the basin you chose. The full pedestal line is in one place, and we will answer spec questions on any model.
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Drain and faucet standards described (45 mm hole, 1.75 in US connection, overflow vs non-overflow) reflect common lavatory practice for our basins. Local plumbing code may require specific trap and supply configurations; confirm with your installer.