Applies to models: Tuva and Stan Smart Toilets
Part Number: 99TOI0131-OU

Overview

You can also download the full illustrated PDF at the end of this article.

🪛 Section 1: How to Remove the Toilet Seat

Follow these steps carefully before installing your new seat.

Step 1 — Unplug the Power

• Disconnect the toilet seat power cable from the wall outlet.

• Ensure the unit is powered off completely for safety.

Step 2 — Close the Water Valve

• Turn the water supply valve to the OFF position to stop the water flow.

• Confirm no water is flowing into the toilet before proceeding.

Step 3 — Remove the Existing Seat

• Lift the seat gently and pull backward to detach it from the mounting base.

• If necessary, press the release buttons (for newer models) to unlock the seat.

Step 4 — Disconnect the Water Hose and Solenoid Wire

• Identify whether you have an old style or new style connection:

  • Old Style: Straight coupling.

  • New Style: Quick-release connector with clip.

• Carefully detach the water hose connection from the solenoid valve.
  

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🧩 Section 2: How to Install the Toilet Seat

Now you can attach the new Tuva or Stan seat.

Step 1 — Attach the Water Hose

• Connect the new seat’s water hose to the solenoid valve and smart seat.

• Match the correct connector type:
  

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  • New style: Direct fit.

  • Old solenoid valve: Use an adapter (sold separately, Part#: 99TOI-ST303O0O-OU).

• Make sure the connectors click securely into place.

Step 2 — Install the New Seat

• Align the seat with the mounting base.

• Slide it forward until it clicks into place.

Step 3 — Open the Water Valve

• Turn the water supply valve back ON.

• Check for leaks at all connection points.

Step 4 — Plug in the Power Cord

• Plug the power cable back into the wall outlet.

• The seat should power on automatically.

⚙️ Optional: Using the Adapter

If you’re replacing an older seat version and have an old solenoid valve, use the adapter (Part#: 99TOI-ST303O0O-OU) to connect the new smart seat.

💡 Tips & Troubleshooting

• If the seat doesn’t fit securely, verify you’re using the correct mounting hardware.

• For persistent leaks, inspect the O-rings or washers on the hose connectors.

• If the power light doesn’t turn on, check the GFCI outlet or reset button.

🧾 Support Information

If you experience difficulties during installation: