Toto spares, Toto parts, Toto spare parts, Spare code no : I387-STIV4,
Here are the complete details and uses of TOTO spare I387-STIV4:
🔧 I387-STIV4 – Details
- Part code: I387-STIV4
- Type: Soft-closing unit (damper mechanism)
- Category: TOTO toilet seat / Ecowasher spare
- Function: Controls slow, smooth closing of the toilet seat or lid
- Identified in spare listings as a “Soft Closing Unit”
🧩 Main Use
The I387-STIV4 is used as:
✔️ Soft-close hinge/damper
- Installed inside the hinge assembly of TOTO seat covers
- Ensures:
- Lid/seat does not slam
- Smooth, silent closing
- Reduced wear on ceramic and hinges
✔️ Seat ring mechanism (important difference)
- Specifically used for seat ring soft closing (not just lid in some models)
- That means:
- Works on the actual seat (where you sit)
- Not only the top lid (like STIV3 in many cases)
🔄 Difference vs similar parts
Understanding this helps avoid wrong purchase:
PartUsageI387-STIV3Mostly lid soft-close mechanismI387-STIV4Full soft-close unit (often for seat ring / upgraded models)U6220S-STIV seriesAlternative soft-close units for other models
👉 In short:
STIV4 is a more complete or newer soft-close unit compared to STIV3.
🛠️ When to replace
You likely need I387-STIV4 if:
- Seat drops suddenly (no damping)
- Seat closes unevenly (one side faster)
- Clicking / loose hinge feeling
- Seat doesn’t stay aligned
⚙️ Where it is used
- TOTO Ecowasher / Washlet seat covers
- Premium soft-close toilet seats
- Models with dual dampers (left + right hinges)
⚠️ Important before buying
- TOTO parts are model-specific
- STIV4 may not fit if your original is STIV2/STIV3
- Always check:
- Seat model number (e.g., TCxxxx / Washlet model)
- Whether issue is lid or seat
TOTO : Control unit, toto Powercable, toto Rubber flapper, toto Signal Cable& Conduit Pipe, toto Right hook,
toto Screw, toto Concealed Automatic Urinal Flush Valve, toto Shower Hanger & Screw, toto check nut & lock on cartridge, toto Controller Unit, toto Cartridge, toto Fill Valve, toto HANDLE/KNOB, toto SSBolts &Nuts, toto PRESSURE CONTR.., toto Avante Wall Hung Toilet W/Invisible Fixing Kit, toto Flexible Hose, INDIA.
TOTO : Base Plate Assy, toto Soft Landing Unit, toto Soft Landing Unit, toto Damper dryer for WL .., toto DUMPER / PLASTIC LID ON WAND, toto Indication Substrate Assembly, toto Fixed Shower Head, toto Bath & Spout, toto Handle,
Toto thermostatic knob, toto Flange Cap, toto Flange Plate, toto Clamp for valve connector, toto FRAME, toto sensorunit, toto Towel Ring, toto IN WALL SENSOR URINAL FLUSH VALVE, toto Ceramic cartridge for Faucets DUBAI.
Company Name : Bharat Enterprises.
Web : www.bechennai.com.
Mobile no : 888 333 333 22.
Keywords
