Toto spares, Toto parts, Toto spare parts, Spare code no : TN91-5RR - Water inlet Unit,
- TN91‑5RR is a Japanese (literally “water supply fitting / inlet fitting”) listed as a spare part for TOTO.
- The part listing mentions that TN91‑5RR (formerly TN91‑5N) is used in various automatic / sensor urinal models of TOTO, including:
• US800C, US800CE, US800CK (low lips, auto‑flush urinals) US810 series, US820 series, US860 series (floor / wall mounted automatic urinals)
Thus, its primary application is as the water inlet connection / fitting in automatic flush / sensor urinal units.
Known specifications / features from listing
From the Japanese parts listing page:
- Price: ~ 7,000 yen (including tax) as a spare part.
- It explicitly states the part is shipped in 2–3 business days (for non–made‑to‑order stock) for typical orders.
However, the listing does not provide detailed dimensional data (e.g. thread size, bore diameter, length) in that source.
Inferred / likely technical details & parameters to confirm
Because it is a water inlet fitting used in automatic urinals, you can expect (or need to check) the following typical parameters:
ParameterLikely / Typical Values / ConsiderationsNotes / what to checkThread / connection typeIt may use standard plumbing threads (e.g. ½″, ¾″, or metric threads) or a proprietary TOTO interfaceMeasure existing inlet in the urinal or refer to the flush unit’s drawingMaterialLikely brass or plated brass, or corrosion‑resistant metalShould resist water exposure, corrosionInternal bore / orifice sizeSufficient to let flush flow throughShould match the flush valve’s designSealing / gasket interfaceMay use O‑rings, flat washers, or conical seatsThe mating surface and seal type is importantLength / extension / depthThe depth that the fitting projects into the urinal or plumbing lineTo ensure proper alignment with flush valveMounting orientation / geometryThe inlet fitting must align properly with sensor / flush valve bodyMust fit without interference.
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