Introduction
This manual provides detailed instructions for the installation, operation, and maintenance of your Miseno MNO-191 Circular 16-1/2" Tempered Glass Vessel Bathroom Sink. Please read all instructions carefully before beginning installation to ensure proper function and safety. Keep this manual for future reference.

Image: Miseno MNO-191 Tempered Glass Vessel Bathroom Sink with Gun Metal Drain.
Safety Information
Always observe basic safety precautions when installing or maintaining plumbing fixtures. Failure to follow these instructions could result in property damage or personal injury.
- Turn off the main water supply before beginning any installation.
- Wear appropriate personal protective equipment, such as safety glasses and gloves.
- Ensure all connections are secure and watertight to prevent leaks.
- If you are unsure about any part of the installation process, consult a qualified plumber.
- Handle glass components with care to prevent breakage.
Package Contents
Verify that all components are present before discarding packaging materials. If any parts are missing or damaged, contact Miseno customer support.
- Miseno MNO-191 Tempered Glass Vessel Sink
- Solid Brass Drain Assembly (Gun Metal finish)
- Mounting Hardware (gaskets, nuts, washers)
Tools Required (Not Included)
- Adjustable Wrench
- Plumber's Putty or Silicone Sealant
- Measuring Tape
- Pencil or Marker
- Drill (if new countertop hole is needed)
- Hole Saw (appropriate size for drain, if new countertop hole is needed)
- Safety Glasses
- Gloves
Setup (Installation)
The Miseno MNO-191 is a vessel sink, designed to be mounted on top of the counter. Follow these general steps for installation:
1. Prepare the Countertop
Ensure your countertop has a standard 1-1/2 inch drain opening. If a new hole is required, carefully measure and cut the opening according to the sink's drain specifications. The center drain location provides optimal draining capability.

Image: Top view of the Miseno MNO-191 sink, highlighting the drain opening.
2. Install the Drain Assembly
- Apply a bead of plumber's putty or silicone sealant around the underside of the drain flange.
- Insert the drain flange into the sink's drain opening.
- From underneath the sink, place the rubber washer, then the friction washer, and finally thread the lock nut onto the drain body.
- Tighten the lock nut by hand, then use an adjustable wrench to secure it firmly, ensuring a watertight seal. Do not overtighten.
3. Position the Sink
Carefully place the vessel sink with the installed drain assembly onto the countertop, aligning the drain with the countertop opening. Ensure the sink is centered and level.

Image: Miseno MNO-191 vessel sink mounted on a bathroom vanity.
4. Secure the Sink
Apply a thin bead of silicone sealant around the base of the sink where it meets the countertop to secure it and prevent water from seeping underneath. Allow the sealant to cure according to the manufacturer's instructions.
5. Connect Plumbing
Connect the P-trap and drain pipe to the tailpiece of the drain assembly. Ensure all connections are hand-tightened, then use an adjustable wrench for a final snug fit. Avoid overtightening.
6. Test for Leaks
Once all connections are made, turn on the main water supply and fill the sink with water. Check all drain connections for any signs of leaks. If leaks are detected, tighten connections as necessary.
Operating Instructions
The Miseno MNO-191 vessel sink is designed for standard bathroom use. Operate your faucet as usual to fill and drain the sink. The included pop-up drain assembly allows for easy opening and closing of the drain.
Maintenance
Proper care and maintenance will ensure the longevity and appearance of your Miseno vessel sink.
- Cleaning the Sink: Wipe with a dry cloth after each use to prevent water spots and mineral buildup. For deeper cleaning, use a mild, non-abrasive glass cleaner and a soft cloth. Avoid harsh chemicals, abrasive cleaners, or scouring pads, as these can scratch or damage the tempered glass surface.
- Cleaning the Drain: The solid brass drain assembly can be cleaned with a soft cloth and mild soap. Avoid abrasive cleaners or strong chemicals that may damage the finish.
- Preventing Damage: Do not drop heavy or sharp objects into the sink, as this may chip or break the glass. Avoid extreme temperature changes, which can stress the glass.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Leaking around drain | Loose drain nut, improper sealant application, damaged washer. | Tighten drain nut. Reapply plumber's putty or silicone sealant. Replace damaged washers. |
| Slow drainage | Partial clog in drain or P-trap. | Remove and clean the pop-up stopper. Clear any debris from the P-trap. |
| Water spots or mineral buildup | Hard water residue. | Wipe sink dry after each use. Use a mild glass cleaner for stubborn spots. |
Specifications
| Feature | Detail |
|---|---|
| Brand | Miseno |
| Model Number | MNO-191 |
| Material | Tempered Glass |
| Color (Drain) | Gun Metal |
| Overall Height | 5-3/4" (bottom of sink to top of rim) |
| Overall Width | 16-1/2" (back outer rim to front outer rim) |
| Overall Length | 16-1/2" (left outer rim to right outer rim) |
| Basin Depth | 5-3/4" (center of basin to the rim) |
| Installation Type | Vessel (sink mounted on top of the counter) |
| Drain Outlet Connection | 1-1/2" (standard) |
| Item Weight | 17 Pounds |
| Shape | Round |
| Style | Modern |
Warranty Information
The Miseno MNO-191 vessel sink fixture is fully covered under warranty by Miseno for 1-year after installation. This is a limited warranty. For specific details regarding warranty coverage and claims, please refer to the official Miseno warranty documentation or contact Miseno customer support.
Customer Support
For technical assistance, missing parts, or warranty inquiries, please contact Miseno customer support. Refer to the Miseno official website for the most current contact information.
Please have your model number (MNO-191) and purchase date available when contacting support.