Introduction
This instruction manual provides detailed guidance for the installation, operation, and maintenance of your Moen T623 Chrome Tub and Shower Faucet. Please read this manual thoroughly before beginning installation or use to ensure proper function and longevity of your product. Retain this manual for future reference.
Safety Information
- Always turn off the main water supply before installing or servicing the faucet.
- Wear appropriate personal protective equipment, such as safety glasses and gloves, during installation.
- If you are unsure about any part of the installation process, consult a qualified plumber.
- Ensure all local plumbing and building codes are followed.
- Do not overtighten connections, as this may cause damage to the product or plumbing.
Package Contents
Verify that all components are present before beginning installation:
- Tub Faucet Spout (Boardwalk Deck Mounted Roman style)
- Two Faucet Handles
- Mounting Hardware
- Installation Instructions (this manual)

Figure 1: This image displays the Moen T623 Chrome Tub and Shower Faucet. It features a central curved spout and two lever-style handles, all with a polished chrome finish, designed for deck mounting.
Setup and Installation
Pre-Installation Considerations:
- This faucet is designed for deck-mounted installation with two holes.
- Valve Compatibility: Ensure your existing or new valve system is compatible with Moen T623 trim. Older Moen valves may not be compatible with newer Moen trim kits, requiring a valve replacement. Consult Moen's compatibility charts or a professional plumber if uncertain.
- Gather necessary tools: adjustable wrench, pipe wrench, screwdriver, plumber's putty or silicone sealant, tape measure, and thread seal tape.
Installation Steps:
- Turn Off Water Supply: Locate and turn off the main water supply to your bathroom. Open nearby faucets to relieve pressure.
- Remove Old Faucet (if applicable): Disconnect water lines and mounting nuts from the underside of the deck. Carefully lift and remove the old faucet. Clean the mounting surface thoroughly.
- Install Valve Body (if new installation): Follow the specific instructions provided with your Moen valve body for proper installation into the deck. Ensure it is securely fastened and level.
- Install Faucet Spout: Apply a thin bead of plumber's putty or silicone sealant around the base of the faucet spout. Insert the spout through the center hole in the deck. From underneath, secure the spout with the provided washer and mounting nut. Hand-tighten, then use a wrench for a final snug turn, being careful not to overtighten.
- Install Faucet Handles: Place the handle bases over the side holes in the deck. Connect the hot and cold water lines to the corresponding valve inlets according to the valve body instructions. Secure the handles from underneath with their respective washers and mounting nuts. Attach the handle levers to the stems.
- Connect Water Supply Lines: Connect the hot and cold water supply lines from your home's plumbing to the appropriate inlets on the valve body. Use thread seal tape on threaded connections and tighten securely with a wrench.
- Test for Leaks: Slowly turn on the main water supply. Check all connections for leaks. If leaks are present, gently tighten the connections until they stop.
- Flush Faucet: Remove the aerator (if present) from the spout. Turn on both hot and cold water to full flow for several minutes to flush out any debris from the lines. Turn off the water, reattach the aerator.
Operating Instructions
The Moen T623 faucet features two lever handles for controlling water flow and temperature.
- Turning On/Off: Lift the lever handles to turn on the water. Push them down to turn off the water.
- Adjusting Temperature: The left handle controls hot water, and the right handle controls cold water. Adjust both handles to achieve the desired water temperature.
- Adjusting Flow: The height to which you lift the handles controls the water flow rate.
Maintenance
Cleaning the Faucet:
- To maintain the chrome finish, clean regularly with a soft, damp cloth.
- Use only mild soap and water. Avoid abrasive cleaners, harsh chemicals, or polishes that could damage the finish.
- Dry the faucet with a soft towel after cleaning to prevent water spots.
Aerator Maintenance:
- If water flow decreases or becomes erratic, the aerator may be clogged.
- Unscrew the aerator from the end of the spout.
- Rinse any debris from the screen. For stubborn mineral deposits, soak the aerator in a solution of equal parts white vinegar and water.
- Reattach the aerator, ensuring it is securely tightened.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Low Water Flow | Clogged aerator; partially closed shut-off valves; debris in water lines. | Clean aerator. Ensure shut-off valves are fully open. Flush water lines. |
| Leaking at Spout Base | Improperly seated spout; worn O-rings. | Check spout mounting nut for tightness. Inspect and replace O-rings if necessary. |
| Leaking at Handle Base | Loose handle mounting nut; worn cartridge. | Tighten handle mounting nut. Replace cartridge if leak persists. |
| Water Temperature Issues | Incorrect valve adjustment; issues with water heater. | Verify hot and cold water supply. Check water heater settings. |
If troubleshooting steps do not resolve the issue, contact Moen customer support or a qualified plumber.
Specifications
- Brand: Moen
- Model Name: T623
- Finish Type: Chrome
- Material: Metal
- Mounting Type: Deck Mount
- Number of Handles: 2
- Hole Count: 2
- Style: Boardwalk
- Spout Height: 10 Inches
- Spout Reach: 10 Inches
- Item Weight: 5.2 Pounds
- Product Dimensions: 13.5 x 9.2 x 3.2 inches
- UPC: 026508256848
Warranty Information
The Moen T623 Tub and Shower Faucet is backed by a Limited Lifetime Warranty. This warranty covers defects in material and manufacturing workmanship for the original consumer purchaser. For full details regarding warranty coverage, terms, and conditions, please refer to the official Moen warranty documentation or visit the Moen website.
To make a warranty claim, proof of purchase may be required. Do not attempt to repair or modify the product yourself, as this may void the warranty.
Support
For technical assistance, replacement parts, or further information regarding your Moen T623 faucet, please contact Moen Customer Service. Contact details can typically be found on the official Moen website or on the product packaging.
When contacting support, please have your product model number (T623) and proof of purchase available.





