In commercial bathrooms, the wall-hung versus two-piece decision is settled by three numbers before it is settled by design: 495 mm, 517 mm and 660 mm. This head-to-head places verified FI-20 and FI-05 ceramic sanitary ware data side by side so project teams can choose a configuration that fits the build, the cleaning regime and the market listing.

Wall-hung and two-piece toilets are both ceramic sanitary ware, both use a washdown flush in the FI-20 and FI-05 range, and both are produced from high-temperature fired ceramic. They are not interchangeable inside the same bathroom plan. The FI-20 wall hang pan measures 495 × 365 × 365 mm and the FI-05 wall hang pan measures 517 × 360 × 365 mm, while the FI-20 two-piece toilet measures 660 × 365 × 420 mm and the FI-05 two-piece toilet measures 660 × 360 × 420 mm. That difference — up to 165 mm of additional projection — is what construction, engineering and wholesale buyers are actually deciding on.

FI-20 wall hang pan: 495 × 365 × 365 mm, wall hung, rimless, washdown flush, high-temperature fired ceramic.

The Specification Problem: One Ceramic Platform, Two Installation Types

Every model in this comparison shares a material platform: high-temperature fired ceramic with a glossy, easy-to-clean glazed surface, and a washdown flushing mechanism. What changes is how the bowl meets the building — and that is where commercial projects lose time.

A wall-hung toilet mounts to the wall and leaves the floor clear. Within the FI range that means the pan projects 495 mm (FI-20 wall hang pan) or 517 mm (FI-05 wall hang pan) from the wall face. A two-piece toilet stands on the floor with its cistern carried on the bowl, and projects 660 mm — 165 mm further than the FI-20 wall hang pan and 143 mm further than the FI-05 wall hang pan.

Three recurring project risks follow from that geometry:

• Layout risk. Where a door swing, shower screen or vanity already consumes the room, a 660 mm projection may not fit where a 495–517 mm pan would.
• Build-sequence risk. Wall-hung pans depend on in-wall support and a concealed flushing arrangement, while two-piece models connect on the floor. The choice therefore has to be locked before walls are closed and tiled.
• Listing risk. Certification follows the model and the market, not the brand. A pan listed for one market is not automatically accepted in another, and buyers who assume otherwise carry the rework cost.

Industry Background: Why Detail-Level Specification Now Decides Projects

Ceramic sanitary ware demand keeps expanding. Grand View Research estimated the global ceramic sanitary ware market at USD 44.3 billion in 2023 and projected it to reach USD 80.99 billion by 2030, a CAGR of 9.4%. Precedence Research put Asia Pacific at a 54% revenue share in 2024, with China and India as the primary growth engines. China's export position is dominant: MECS / Ceramic World Review records 2.17 million tonnes of sanitary ceramics exported from China in 2024, equal to 58.4% of global export volume.

Value moved differently from volume. China's total sanitary ware export value in 2024 was USD 15.637 billion, a 4.69% decrease year-on-year — a pattern the customs-based data describes as "increasing quantity but decreasing price." For a project buyer, that is an argument for specifying against verified model data rather than against price alone.

Application mix reinforces the same conclusion. Mordor Intelligence identifies commercial applications, including hotel projects, as the segment expected to show the highest CAGR as tourism recovers, and notes adoption of antimicrobial-glazed ceramics in that segment. Commercial work also carries the heaviest compliance load: cUPC (Uniform Plumbing Code) compliance is a mandatory requirement for many commercial and government plumbing projects in North America, and WaterMark certification is the primary requirement for plumbing and drainage products in Australia and New Zealand.

Manufacturing location matters to that supply chain. Tangshan Houfengyuan Import and Export Co., Ltd. operates out of Tangshan, Hebei, a major Chinese industrial cluster for ceramics and building materials. The company manufactures ceramic toilets and ceramic wash basins for construction and engineering projects and wholesale distribution, exporting to the USA, Canada, Australia, the Middle East, Southeast Asia and Europe. Product and contact details are published at hfybath.com.

Head-to-Head: FI-20 and FI-05, Verified Model by Model

FI-20 wall hang pan — 495 × 365 × 365 mm

The FI-20 wall hang pan is a wall-hung toilet in high-temperature fired ceramic, with a washdown flushing mechanism and a rimless bowl. Its overall dimensions are 495 × 365 × 365 mm (length × width × height). Removing the internal rim ledge on a rimless bowl exposes the ceramic surface for direct cleaning, which is the reason the design is specified in hotel and apartment bathrooms where housekeeping cycles are frequent. The model is intended for construction and engineering projects and wholesale distribution.

FI-05 wall hang pan — 517 × 360 × 365 mm

The FI-05 wall hang pan is also a wall-hung toilet with a rimless design, a washdown flush and high-temperature fired ceramic construction. Overall dimensions are 517 × 360 × 365 mm. Set against the FI-20 wall hang pan, it is 22 mm longer and 5 mm narrower. In practice that difference matters only when the wall face position is already fixed by a tile set-out or a duct enclosure — but when it does matter, it matters before the wall is closed.

FI-20 two-piece toilet — 660 × 365 × 420 mm

Model FI-20 is also available as a two-piece toilet, made of high-temperature fired ceramic with a washdown toilet configuration and overall dimensions of 660 × 365 × 420 mm. It shares the 365 mm width of the FI-20 wall hang pan and adds floor-standing support with an integrated cistern. The projection measured against the same plan increases from 495 mm to 660 mm.

FI-20 two-piece toilet: 660 × 365 × 420 mm, washdown flush, high-temperature fired ceramic.

FI-05 two-piece toilet — 660 × 360 × 420 mm

The two-piece version of the FI-05 is a washdown toilet in high-temperature fired ceramic with overall dimensions of 660 × 360 × 420 mm. It keeps the 360 mm width of the FI-05 wall hang pan, so a project that standardises on the FI-05 family holds one width across both installation types and only changes the depth and the build sequence.

Back-to-wall pans: the middle step in the same two families

Two further configurations sit between the extremes. The FI-20 back to wall pan measures 520 × 365 × 420 mm with a rimless bowl, and the FI-05 back to wall pan measures 520 × 360 × 420 mm, also rimless. Both are washdown, high-temperature fired ceramic and are listed for the same construction and wholesale applications. The result is a three-step footprint ladder inside two model families: 495 mm or 517 mm wall-hung, 520 mm back-to-wall, 660 mm two-piece.

What is shared across the platform

• Material: high-temperature fired ceramic on every FI-20 and FI-05 model in this comparison.
• Flushing: a washdown mechanism on the FI-20 and FI-05 wall-hung, back-to-wall and two-piece models listed here.
• Rimless bowls: specified on the FI-20 and FI-05 wall hang pans and back to wall pans.
• Surface: a glossy, easy-to-clean glazed finish, which is the manufacturer's stated approach to durable, easy-clean surfaces.
• Application: construction and engineering projects plus wholesale distribution, supported by export markets spanning the USA, Canada, Australia, the Middle East, Southeast Asia and Europe.

Installation Type: What Each Configuration Requires

Wall-hung installation is a build-stage decision. The pan hangs from the wall, so support framing and a concealed flushing arrangement must be planned, installed and inspected before the wall is closed and tiled. In exchange, the floor beneath the pan stays clear, which simplifies cleaning in hotel rooms, apartments and commercial washrooms, and keeps the visible ceramic above the wettest part of the floor.

Two-piece installation is a fit-out decision. The bowl and cistern stand on the floor and connect to the drainage and water supply in the conventional way, so the fixture can be installed later in the programme and replaced with less disruption. The trade-off is the 660 mm projection and a larger visible ceramic surface to clean around the base and tank.

Neither approach is better in the abstract. They are two different construction sequences, and the one that fits is the one the project can actually support at the moment the specification is signed. That is also why the back-to-wall pans at 520 mm are worth keeping in the conversation: they reduce the exposed footprint without requiring the full floor-standing depth of a two-piece model.

Step-by-Step: Specifying FI-20 or FI-05 for a Commercial Bathroom

1. Measure the available projection. Establish the distance from the finished wall face to the drain centre, the door swing and the shower screen. A 495 mm (FI-20 wall hang pan) or 517 mm (FI-05 wall hang pan) wall-hung projection fits layouts where a 660 mm two-piece model would foul another element.
2. Decide the installation sequence. If the wall is still open and in-wall support is planned, the wall-hung route is available. If the floor, drainage and finishes are already set, the two-piece models at 660 × 365 × 420 mm (FI-20) or 660 × 360 × 420 mm (FI-05) are the lower-disruption option. The 520 mm back-to-wall pans sit between the two.
3. Standardise on one family width. FI-20 models are 365 mm wide; FI-05 models are 360 mm wide. Holding one family across repeated bathroom modules simplifies tile set-out, seat specification and spare-part inventory.
4. Confirm the market listing for the exact model. Australia and New Zealand projects work to WaterMark; North American commercial and government work commonly requires cUPC. Verify that the model number being specified appears in the listing — not simply that the supplier holds certificates.
5. Lock the detail specification in writing. Where the project needs a specific commercial detail — logo, colour, seat height, flush volume or private labelling — it must be stated in the purchase specification, because these are configured at production, not resolved on site.
6. Validate with samples and a water test, then plan lead time. Set the sample approval gate before releasing the production order, and align the site programme with the supplier's stated lead time so that delivery lands with the installation sequence.

Compliance Route by Market: What the FI-20 and FI-05 Listings Actually Cover

Australia — WaterMark. The FI-20 and FI-05 wall hang pans, back to wall pans and two-piece toilets are covered by a WaterMark Certificate of Conformity, certificate number WMK26227, issued by SAI Global and valid to 10 July 2027. The declared scope is water closet pans, flushing devices and cistern inlet and outlet valves, certified to AS 1172.1-2014 (Amdt 1 2018) and AS 1172.2-2014 (Amdt 1 2018), for the Australian market.

WaterMark Certificate of Conformity WMK26227 (SAI Global) covering the FI-20 and FI-05 wall-hung, back-to-wall and two-piece models for Australia.

North America — cUPC and EPA WaterSense. For the USA and Canada, the manufacturer holds cUPC listings under File No. 6560 for ceramic plumbing fixtures and File No. 6559 for dual flush water closets, plus an EPA WaterSense listing under File No. 6561 for high efficiency toilets. In the certification records reviewed for this comparison, the models named in those North American listings are the FTO-8848 one-piece toilet, and the FTZ-0420D and FTZ-0425HD two-piece toilets. The FI-20 and FI-05 pans and two-piece models in this head-to-head are named on the WaterMark listing instead.

Use Cases: Which Configuration Earns Its Place

Hotel project ceramic sanitary ware

Guest bathrooms in hotel projects are usually space-constrained and cleaned on a daily cycle. A wall-hung pan at 495 mm (FI-20 wall hang pan) or 517 mm (FI-05 wall hang pan) keeps the floor clear, which shortens housekeeping work around the bowl base. Mordor Intelligence expects commercial applications, including hotel projects, to show the highest CAGR as tourism recovers, which keeps this configuration in demand rather than in decline.

Apartment decoration and residential fit-out

In apartment decoration programmes where the slab, drainage and wet-wall set-out are already fixed, the two-piece FI-20 (660 × 365 × 420 mm) and FI-05 (660 × 360 × 420 mm) are typically the simpler specification, because they connect on the floor and can be installed later in the sequence. Where the design brief calls for a reduced visual footprint in the same project, the 520 mm back-to-wall pans remain available in the same two families.

Commercial and high-traffic sanitation

Rimless washdown pans in high-temperature fired ceramic are specified for cleaning access and surface durability. Within this platform the FI-20 and FI-05 wall hang pans and back to wall pans are rimless, while the two-piece models listed here are washdown. Where a project prefers a siphonic flush instead, the range includes the FTZ-0420D at 680 × 418 × 734 mm with a 305 mm S-trap roughing-in and the FTZ-0425HD at 730 × 418 × 790 mm with a 305 mm S-trap roughing-in, both of which appear in the dual flush cUPC listing.

Glaze spraying on high-temperature fired ceramic sanitary ware — the process behind the glossy, easy-to-clean surface.

Wholesale distribution

For distributors, the argument for holding both installation types inside two model families is coverage with limited complexity. One stock-keeping logic serves new-build (wall-hung), retrofit (two-piece) and design-led demand (back-to-wall), while material, flush technology and spare-part references stay consistent across the family. Supply parameters published by the manufacturer are a minimum order quantity of 50 units, a production lead time of 35–45 days and a monthly capacity of 290,000 units.

Comparison Table: FI-20 and FI-05 Configuration Data

Frequently Asked Questions

Conclusion: Choosing Between Wall-Hung and Two-Piece for Your Project

The decision rule for commercial projects is short. Specify the FI-20 wall hang pan (495 × 365 × 365 mm) or the FI-05 wall hang pan (517 × 360 × 365 mm) when the wall is still open, floor clearance is the priority, and the market listing matches the FI range — which is the case in Australia through WaterMark certificate WMK26227. Specify the 520 mm back-to-wall pan when the brief calls for a reduced visual footprint without full floor-standing depth. Specify the 660 mm two-piece models — FI-20 at 660 × 365 × 420 mm and FI-05 at 660 × 360 × 420 mm — when the floor and drainage set-out are already fixed, or when the installation programme requires the fixtures to go in later. In all three cases, confirm the listing that applies to the destination market before the order is placed, and validate the configuration with a sample and water test before production begins.

Project and wholesale orders prepared for shipment — FI-20 and FI-05 configurations supplied from Tangshan, Hebei.