

Siphonic One-Piece Toilet, 10/12 Inch Rough-In
HSJ-2425 is a floor-mounted one-piece toilet in white ceramic, offered in siphonic or washdown flush versions; the version is confirmed at quotation. Floor drains use the S-trap outlet at 250 mm (10 in) or 300 mm (12 in) rough-in, and wall drains use the 180 mm P-trap outlet. The catalog prints one size for the model: 680 × 400 × 760 mm (26.8 × 15.7 × 29.9 in). Contractors and dealers get 2 flush choices and 3 outlet choices from one model code.
Compare footprints and flush types across the one-piece toilet range.
More in 12 Inch Rough-In Toilets
Mix any models in one 20ft container · no per-model minimum
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SL-8042Siphonic Two-Piece Toilet, 12 Inch Rough-In27.2" × 14.4" × 31.5"Floor-mounted
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NBK-3076One-Piece Toilet, 12/16 Inch Rough-In28.3" × 16.1" × 30.3"Floor-mounted
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HSJ-V8200 / HSJ-V870029 Inch Floor-Mounted Smart Toilet, 12/16 Inch Rough-In28.7" × 15.4" × 22.6"Floor-mounted, S-trap
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HSJ-G1528 Inch Floor-Mounted Smart Toilet, 12/16 Inch Rough-In27.5" × 15.5" × 18.8"Floor-mounted, S-trap
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HSJ-300728 Inch Washdown Two-Piece Toilet, 10/12 Inch Rough-In27.6" × 15.0" × 31.1"Floor-mounted, S-trap or P-trap
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HSJ-300426 Inch Washdown Two-Piece Toilet, 10/12 Inch Rough-In26.0" × 14.8" × 31.1"Floor-mounted, S-trap or P-trap
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HSJ-2555Washdown One-Piece Toilet, 12 Inch Rough-In29.9" × 14.2" × 31.7"Floor-mounted, S-trap
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HSJ-253123 Inch Swirl Flush One-Piece Toilet, 12 Inch Rough-In23.2" × 14.4" × 28.0"Floor-mounted, S-trap
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HSJ-252827 Inch Swirl Flush One-Piece Toilet, 12 Inch Rough-In26.8" × 14.6" × 29.9"Floor-mounted, S-trap
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HSJ-252724 Inch Swirl Flush One-Piece Toilet, 12 Inch Rough-In24.4" × 14.6" × 29.1"Floor-mounted, S-trap
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HSJ-2499Washdown One-Piece Toilet, 10/12 Inch Rough-In, 750 × 400 × 660 mm29.5" × 15.7" × 26.0"Floor-mounted, S-trap
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HSJ-2498Washdown One-Piece Toilet, 10/12 Inch Rough-In, 680 × 375 × 810 mm26.8" × 14.8" × 31.9"Floor-mounted, S-trap or P-trap
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HSJ-2497Washdown One-Piece Toilet, 10/12 Inch Rough-In, 700 × 390 × 740 mm27.6" × 15.4" × 29.1"Floor-mounted, S-trap or P-trap
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HSJ-2496Washdown One-Piece Toilet, 10/12 Inch Rough-In, 700 × 380 × 820 mm27.6" × 15.0" × 32.3"Floor-mounted, S-trap or P-trap
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HSJ-249526 Inch Washdown One-Piece Toilet, 10/12 Inch Rough-In26.0" × 14.2" × 33.5"Floor-mounted, S-trap or P-trap
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HSJ-249429 Inch Swirl Flush One-Piece Toilet, 12 Inch Rough-In28.7" × 15.4" × 27.2"Floor-mounted, S-trap
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HSJ-2441Rimless Siphonic One-Piece Toilet, 10/12/16 Inch Rough-In27.2" × 14.6" × 30.3"Floor-mounted, S-trap or P-trap
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HSJ-2427Siphonic One-Piece Toilet, 10/12/16 Inch Rough-In, 700 × 390 × 750 mm27.6" × 15.4" × 29.5"Floor-mounted, S-trap or P-trap
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HSJ-242426 Inch Siphonic One-Piece Toilet, 10/12/16 Inch Rough-In26.4" × 14.0" × 30.9"Floor-mounted, S-trap or P-trap
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HSJ-240327 Inch Siphonic One-Piece Toilet, 10/12/16 Inch Rough-In27.0" × 15.2" × 32.3"Floor-mounted, S-trap or P-trap
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HSJ-2401Rimless Washdown One-Piece Toilet, 10/12/16 Inch Rough-In25.6" × 14.2" × 29.3"Floor-mounted, S-trap or P-trap
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HSJ-2390Washdown One-Piece Toilet, 10/12/16 Inch Rough-In26.4" × 14.2" × 29.9"Floor-mounted, S-trap or P-trap
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HSJ-2388Washdown One-Piece Toilet, 10/12 Inch Rough-In, 710 × 395 × 645 mm28.0" × 15.6" × 25.4"Floor-mounted, S-trap or P-trap
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HSJ-2373MBlack Washdown One-Piece Toilet, 10/12/16 Inch Rough-In26.8" × 14.6" × 29.5"Floor-mounted, S-trap or P-trap
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HSJ-236829 Inch Washdown One-Piece Toilet, 10/12 Inch Rough-In28.7" × 15.0" × 32.7"Floor-mounted, S-trap or P-trap
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HSJ-2365Washdown One-Piece Toilet, 10/12 Inch Rough-In, 720 × 390 × 750 mm28.3" × 15.4" × 29.5"Floor-mounted, S-trap or P-trap
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HSJ-2364Washdown One-Piece Toilet, 10/12 Inch Rough-In, 700 × 360 × 750 mm27.6" × 14.2" × 29.5"Floor-mounted, S-trap or P-trap
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HSJ-2362Washdown One-Piece Toilet, 10/12 Inch Rough-In, 750 × 410 × 710 mm29.5" × 16.1" × 28.0"Floor-mounted, S-trap or P-trap
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HSJ-2361Washdown One-Piece Toilet, 10/12 Inch Rough-In, 700 × 385 × 760 mm27.6" × 15.2" × 29.9"Floor-mounted, S-trap or P-trap
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HSJ-2347Siphonic One-Piece Toilet, 8/10/12/16 Inch Rough-In, 700 × 380 × 700 mm27.6" × 15.0" × 27.6"Floor-mounted, S-trap or P-trap
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HSJ-2343Siphonic One-Piece Toilet, 8/10/12/16 Inch Rough-In, 720 × 370 × 790 mm28.3" × 14.6" × 31.1"Floor-mounted, S-trap or P-trap
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HSJ-2332Washdown One-Piece Toilet, 4/8/12/16 Inch Rough-In25.2" × 14.6" × 27.0"Floor-mounted, S-trap or P-trap
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HSJ-2202Washdown One-Piece Toilet, 10/12 Inch Rough-In, 680 × 380 × 670 mm26.8" × 15.0" × 26.4"Floor-mounted, S-trap or P-trap
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HSJ-2201Siphonic One-Piece Toilet, 10/12/16 Inch Rough-In, 700 × 370 × 810 mm27.6" × 14.6" × 31.9"Floor-mounted, S-trap or P-trap
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HSJ-2480Siphonic One-Piece Toilet, 12 Inch Rough-In27.2" × 15.4" × 27.4"Floor-mounted, S-trap
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Y2Y2 Smart Bidet Toilet with Dual-User Memory and UV Sterilisation28.3" × 17.9" × 20.1"Floor-mounted, S-trap
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Y1Y1 UV-Sterilising Smart Toilet with Heated Bidet Seat and Foot-Touch Flush28.3" × 17.9" × 20.1"Floor-mounted, S-trap
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E6E6 Radar-Sensor Smart Bidet Toilet with Foot-Sensing Lid and UV Sterilisation26.8" × 16.1" × 18.9"Floor-mounted, S-trap
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E5E5 Foot-Touch Flush Smart Bidet Toilet with Heated Seat and UV Sterilisation26.8" × 15.6" × 19.1"Floor-mounted, S-trap
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964Foot-Sensing Flush Smart Bidet Toilet with Dual-User Memory, UV Sterilisation28.1" × 18.9" × 21.3"Floor-mounted, S-trap
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956Dual-User Memory Smart Bidet Toilet with UV Sterilisation and Child Seat26.8" × 16.1" × 18.3"Floor-mounted, S-trap
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945Foot-Sensing Flush Smart Bidet Toilet with UV Sterilisation and Heated Seat26.8" × 16.1" × 18.3"Floor-mounted, S-trap
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1991Siphonic One-Piece Toilet with Fully Glazed Trapway, 3-Inch Flush Valve27.8" × 15.4" × 27.6"Floor-mounted, S-trap
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1981Tornado Flush One-Piece Toilet with 3-Inch Flush Valve and Soft-Close Seat28.0" × 15.2" × 29.1"Floor-mounted, S-trap
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1978Siphon Jet One-Piece Toilet, 1.28 GPF, 12-Inch Rough-In, Fully Glazed Trapway27.2" × 14.6" × 27.6"Floor-mounted, S-trap
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1939Siphon Jet One-Piece Toilet with 3-Inch Flush Valve, Fully Glazed Trapway27.6" × 15.6" × 28.3"Floor-mounted, S-trap
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1938One-Piece Tornado Flush Toilet with 2-Inch Flush Valve, 1.28 GPF27.6" × 15.2" × 30.7"Floor-mounted, S-trap
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1916Tornado Flush One-Piece Toilet, 3-Inch Flush Valve, Fully Glazed Trapway27.6" × 15.2" × 29.5"Floor-mounted, S-trap
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1009Siphon Jet One-Piece Toilet with 3-Inch Flush Valve, 14.4-Inch Body Width27.0" × 14.4" × 28.5"Floor-mounted, S-trap
Fit data
Rough-in, flush and size of HSJ-2425
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Send the model, selected dimensions, quantity and destination. Confirm specifications, packing and documentation in your quotation.
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Tape-Measure Facts
Sizing the 27 Inch Siphonic One Piece Toilet, 10/12 Inch Rough-In
Catalog dimensions for HSJ-2425 read 680 × 400 × 760 mm, or 26.8 × 15.7 × 29.9 in.
- Length, 680 mm
- 26.8 in
- Width, 400 mm
- 15.7 in
- Height, 760 mm
- 29.9 in
- Outlet versions listed
- 3
Millimeter values are as printed; inch values follow in brackets.
Ceramic Build
Floor-Mounted White Ceramic

White
One-Piece in White
Tank and bowl are joined in one-piece construction. White is the single listed color.
Color is fixed at white, so the RFQ only varies outlet and quantity.
What to put in an HSJ-2425 quote request
- Model: HSJ-2425
- Flush version: siphonic or washdown
- Outlet: S-trap rough-in (250 or 300 mm) or 180 mm P-trap
- Quantity split by outlet
- Destination market
- Carton marking and delivery port
Mount: floor-mounted.
Flush Options
Choosing Between Siphonic and Washdown on HSJ-2425
HSJ-2425 is offered in siphonic or washdown versions; the version is confirmed at quotation.
Siphonic Version
Listed flush version for this model.
Washdown Version
Alternative listed version; the choice is confirmed at quotation.
The version is confirmed at quotation.
Import Paperwork
Documents Matched to the Destination Market
Selling region decides which documents travel with the order.
Certification documents for HSJ-2425 are matched to the destination market at quotation.
Compare Before Ordering
How HSJ-2425 Differs From HSJ-2478
HSJ-2478 is the nearest model in the range to HSJ-2425.
- HSJ-2425 size
- 680 × 400 × 760 mm
- HSJ-2478 size
- 690 × 400 × 770 mm
- HSJ-2425 flush
- Siphonic or Washdown
- HSJ-2478 flush
- Siphonic or Washdown
- HSJ-2425 S-trap
- 250 / 300 mm
- HSJ-2478 S-trap
- 250 mm
Outlet Choice
Drain Positions HSJ-2425 Covers
HSJ-2425 is listed with 2 S-trap rough-ins and a 180 mm P-trap outlet.
250 mm (10 in) Rough-In
Ordered as its own RFQ line.
300 mm (12 in) Rough-In
Measured from finished wall to outlet center.
180 mm P-Trap Outlet
Listed rear-outlet height for wall-waste bathrooms.
How we work
From enquiry to shipment
A factory-direct process built for importers, distributors and project buyers. No trading layer in between.
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01
Send the enquiry
Tell us the model, quantity, destination market and any branding or packaging requirement. A spec sheet or drawing helps but is not required to start.
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02
Our sales team contacts you
A named account manager follows up by email or WhatsApp, confirms the specification and clarifies anything missing before pricing.
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03
Quotation
You receive a written quotation with unit price, MOQ, packing details, lead time and the trade term you asked for. Entry, mid and premium build levels can be quoted side by side.
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04
Sample approval
We send a sample for finish, function and packaging sign-off. Branded samples are produced once artwork is confirmed.
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05
Production and shipment
Mass production starts after sample approval and deposit. QC and inspection run before loading, then the order ships to the agreed port.
OEM and ODM to your specification
We develop to a brief. Send a reference model, a drawing or simply the price band and market you are targeting, and we will propose what fits. Entry, mid and premium builds are all available from the same factory.
- Your logo on product, carton and documentation
- Private-label packaging and manuals
- Custom finish matched to your standard
- Custom dimensions and tooling where volume supports it
- Product development from your reference or price target
- Destination-market documentation prepared on request
FAQs
What height is the 27 inch siphonic one-piece toilet, 10/12 inch rough-in, HSJ-2425?+
How does HSJ-2425 compare with HSJ-2478?+
Which drains does HSJ-2425 fit?+
HSJ-2425 is a 27 inch siphonic one piece toilet, 10/12 inch rough-in versions sharing a 760 mm (29.9 in) overall height. The catalog gives a 680 mm (26.8 in) length and a 400 mm (15.7 in) width for the same white ceramic body. Washdown is the second printed flush version, and a 180 mm P-trap outlet is listed too. Verify against the official technical drawing before fabrication of fitted furniture.
HSJ-2425 lists two flush versions, siphonic and washdown, confirmed at quotation. Each RFQ line names one. White ceramic and the floor mounted one piece toilet design apply to both, so the bathroom looks the same whichever flush is chosen. Projects with a single house standard can set the version once. Request written confirmation from the factory of the flush version on the final order so delivery matches the schedule. The printed 680 × 400 × 760 mm size applies to both versions.
Floor drains for HSJ-2425 are matched by S-trap entries at 250 mm (10 in) and 300 mm (12 in). Wall wastes are matched by the P-trap entry at 180 mm. A drain survey that lists every bathroom with its reading or the letter P turns directly into lines. Readings outside those two S-trap values need another model. Confirm against the model spec sheet for each entry before the order is placed.
















































