Toto spares, Toto parts, Toto spare parts : TBN01001B - Concealed box mini unit.
ere’s what I found about the TOTO TBN01001B Concealed Mini Unit (Univalve Box):
🧩 Overview of TBN01001B — The TOTO “Mini Unit” Univalve Box
The TBN01001B unit, also known as the Mini Unit™ or Univalve Box, serves as a universal concealed rough‑in valve box for shower and thermostat trims TOTO KOREA | 위생기기 업계의 글로벌 리더
. It’s designed to be compact and work with multiple trim types without the need to open walls for changing trims tototest.toto.com.cn
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⚙️ Key Features & Specifications
Universal & Modular Design
- This box is a shared base module: you don't match it to each trim separately. Instead, you can fit different trims (single‑lever handles, thermostats, push‑button controls, etc.) to the same box tototest.toto.com.cn
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- Trim compatibility includes models like TBV01406U, TBV01407U, TBV01408U, TBV02401U, TBV02403U, TBV02404U, TBV02405U, and TBV02406U TOTO KOREA | 위생기기 업계의 글로벌 리더
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Compact & Installation‑Friendly
- Solid brass construction for corrosion resistance.
- Very lightweight (~1.6 lb ≈ 0.73 kg) and compact (about 4.4″ diameter) for ease of installation and minimal load on walls tototest.toto.com.cn
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- Adjustable tolerance of ±1″ (~13 mm) in wall thickness, reducing alignment errors during installation tototest.toto.com.cn
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Performance Requirements
- Operates at typical water pressure ranges: approximately 0.25 MPa to 0.75 MPa in India; China specification notes 0.05–1.0 MPa dynamic/static pressure in.toto.com
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🛠 Compatible Trim & Mixer Combinations
TOTO markets multiple trim sets paired with this unit under various series:
- GF Series (e.g., TBG11304BA + TBN01001B)
- GM Series (TBG09304BA + TBN01001B)
- GR Series (TBG02304BA + TBN01001B)
- GB Series (TBG10304BA + TBN01001B)
All these models use this shared concealed valve box for their square or round mixer plates and diverter systems AF Supply
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📐 Dimensions Summary
AttributeDetailsShape & SizeRough-in box: approx. 4.4″ diameterWeight~1.6 lb (0.73 kg)Wall Tolerance±1″ (±13 mm)MaterialSolid brass, corrosion resistant
Trim‑plate external dimensions (~135 × 72 × 135 mm) are typically consistent across controllers and mixers paired with this box AF Supply
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✅ Why Choose TBN01001B?
- Future‑proof flexibility: switch trim styles (thermostat, single‑lever, diverter, touch style) without opening walls.
- Compact footprint: ideal for thin-wall constructions or renovation.
- Universal compatibility with multiple trim series—reducing part SKUs in inventory.
🧑🔧 Installation & Spares Notes
- Ensure compatible trim model: Confirm that your trim (e.g. TBV-series thermostat or TBG-series lever mixer) is supported by TBN01001B.
- Follow the installation manual or spec sheet: This includes recommended clearances, installation depth, and wall thickness allowances.
- Obtain service documentation: TOTO provides spare parts breakdowns and manuals specific to the box and compatible controllers.
- Pressure check: Confirm water pressure range (≥0.25 MPa) matches local water supply.
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