1. Product Overview
The Westbrass DT18N HotMaster DigiHot Digital Instant Hot Water Tank is designed to provide instant hot water for various kitchen needs, including cooking, beverages, and cleaning. This system delivers up to 100 cups of hot water per hour and features a digital display for precise temperature control.
Key Features:
- Delivers 100 cups per hour of instant hot water.
- 6 pre-selected water temperatures, adjustable from 167°F to 208°F.
- Ultra-fast 1500-Watt heating element with 1-Watt standby power.
- Stainless steel dry-start float and overheat protector to prevent off-tastes and odors.
- Non-pressurized bladder system to prevent catastrophic tank failures.
- On/off control button for vacation or downtime.
- Designed for use with Westbrass Faucets and Hot/Cold Water dispensers.

Figure 1: Front view of the Westbrass DT18N HotMaster DigiHot Digital Instant Hot Water Tank System, showing the digital display and control buttons.
2. Important Safety Information
Please read all instructions carefully before installation and use. Failure to follow these instructions may result in electric shock, fire, property damage, or personal injury.
- DANGER: Electrical Shock or Burn Hazard. Disconnect power before servicing.
- This appliance must be properly grounded.
- Do not operate if the unit is damaged or leaking.
- Ensure all plumbing connections are secure and leak-free before applying power.
- Do not install in an area where freezing may occur.
- Use only with potable water.
- Keep children away from the hot water dispenser.
3. Setup and Installation
Installation should be performed by a qualified plumber or technician. Ensure all local plumbing and electrical codes are followed.
3.1 Components Included:
- (1) Digital Hot Water Tank (Model DT18N)
3.2 Required Tools (Not Included):
- Adjustable wrench
- Screwdriver
- Drill (if installing new faucet)
- Plumber's tape
- Water filters (recommended for optimal performance and longevity)
3.3 Installation Steps:
- Prepare the Installation Area: Ensure sufficient space under the sink for the tank (dimensions: 10.25 x 10.25 x 13 inches) and access for plumbing and electrical connections.
- Mount the Tank: Place the tank in a stable, upright position under the sink.
- Connect Water Supply: Connect the cold water supply line to the inlet of the tank. It is highly recommended to install water filters in line with the cold water supply to the tank to ensure proper operation and extend the life of the unit.
- Connect to Dispenser Faucet: Connect the hot water outlet from the tank to your Westbrass hot water dispenser faucet. Ensure all connections are tight and leak-free.
- Fill the Tank: Before plugging in the unit, open the hot water dispenser faucet and allow water to flow until a steady stream is achieved, indicating the tank is full. Close the faucet.
- Connect Power: Plug the unit into a properly grounded 120V electrical outlet.

Figure 2: Technical drawing showing dimensions and 3/8" NPSM male fittings for the Westbrass DT18N HotMaster Digital Tank Unit.
4. Operating Instructions
The HotMaster DigiHot system features an intuitive digital display for easy operation.
4.1 Initial Startup:
- After connecting power, the digital display will illuminate.
- The unit will begin heating water to the default temperature setting. The display will show the current water temperature.
- Allow approximately 10-15 minutes for the water to reach the set temperature. The "HEATING" indicator will turn off when the water is ready.
4.2 Adjusting Temperature:
- Use the + and - buttons on the digital display to increase or decrease the desired water temperature.
- The temperature can be set between 167°F and 208°F.
- The unit will automatically adjust to the new setting.
4.3 On/Off Control:
- Press the Power button (
) to turn the heating function on or off. - Turning the unit off is recommended for extended periods of non-use, such as vacations.

Figure 3: Close-up of the digital display on the HotMaster DigiHot, showing temperature setting and control buttons.
5. Maintenance
Regular maintenance ensures optimal performance and longevity of your HotMaster DigiHot system.
5.1 Cleaning:
- Wipe the exterior of the tank with a clean, damp cloth. Do not use abrasive cleaners or solvents.
- Ensure the unit is unplugged before cleaning.
5.2 Water Filter Replacement:
- If water filters are installed, replace them according to the filter manufacturer's recommendations.
- Regular filter replacement helps prevent mineral buildup and maintains water quality.
5.3 Descaling (If Necessary):
- In areas with hard water, mineral deposits may accumulate over time. If you notice reduced flow or heating efficiency, descaling may be required.
- Consult a qualified plumber for descaling procedures to avoid damaging the unit.
6. Troubleshooting
Before contacting customer support, please review the following common issues and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| No hot water / Unit not heating |
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| Water is not hot enough |
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| Unit is leaking |
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| Water has an unusual taste or odor |
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7. Specifications
| Feature | Detail |
|---|---|
| Model Name | HotMaster DigiHot Digital Instant Hot Water Tank System for Dispenser Faucets |
| Model Number | DT18N |
| Brand | Westbrass |
| Dimensions (L x W x H) | 10.25 x 10.25 x 13 inches |
| Item Weight | 9.79 pounds |
| Capacity | 100 Cups per hour (approx. 2.5 Quarts / 2.3 Liters) |
| Voltage | 120V |
| Power | 1500 Watts |
| Temperature Range | 167°F - 208°F |
| Material | Stainless Steel |
| Special Features | Overheat Protection, Temperature Control |
| Installation Method | Freestanding (under sink) |
8. Warranty Information
The Westbrass DT18N HotMaster DigiHot Digital Instant Hot Water Tank System comes with a 1-year limited warranty from the date of purchase. This warranty covers defects in materials and workmanship under normal use.
For full warranty details and terms, please refer to the official Westbrass warranty documentation or contact Westbrass customer support.
9. Customer Support
If you have any questions, require technical assistance, or need to report an issue with your Westbrass HotMaster DigiHot system, please contact Westbrass customer support.
- Manufacturer: Westbrass
- Website: Visit the Westbrass Store on Amazon (for product information)
- Phone: 800-39-BRASS (800-392-7277)
- Address: 2429 E. Olympic Blvd., Los Angeles, CA 90021
Please have your model number (DT18N) and date of purchase available when contacting support.




