InSinkErator HWT-00
InSinkErator Instant Hot Water Tank HWT-00 Instruction Manual
Model: HWT-00
Introduction
This manual provides essential information for the safe and efficient installation, operation, and maintenance of your InSinkErator Instant Hot Water Tank, Model HWT-00. Please read all instructions carefully before use.
The InSinkErator HWT-00 Instant Hot Water Tank is designed to provide near-boiling water (approximately 200 degrees F inside the tank) directly at your kitchen sink. This 2/3-gallon stainless steel tank features an easily adjustable thermostat and a 750-watt heating element for quick and convenient hot water access.
Important Safety Information
WARNING: This product can expose you to chemicals including Lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
Always follow basic safety precautions when using electrical appliances to reduce the risk of fire, electric shock, and personal injury.
- Read all instructions before using the appliance.
- Do not touch hot surfaces. Use handles or knobs.
- To protect against electrical shock, do not immerse cord, plugs, or appliance in water or other liquid.
- Close supervision is necessary when any appliance is used by or near children.
- Unplug from outlet when not in use and before cleaning. Allow to cool before putting on or taking off parts.
- Do not operate any appliance with a damaged cord or plug or after the appliance malfunctions or has been damaged in any manner. Return appliance to the nearest authorized service facility for examination, repair, or adjustment.
- The use of accessory attachments not recommended by the appliance manufacturer may cause injuries.
- Do not use outdoors.
- Do not let cord hang over edge of table or counter, or touch hot surfaces.
- Do not place on or near a hot gas or electric burner, or in a heated oven.
- Always attach plug to appliance first, then plug cord into the wall outlet. To disconnect, turn any control to "off", then remove plug from wall outlet.
- Do not use appliance for other than intended use.
What's in the Box
Your InSinkErator Instant Hot Water Tank package includes:
- 2/3-Gallon Stainless Steel Instant Hot Water Tank (HWT-00)
Note: Faucet and water filtration system are sold separately.
Setup and Installation
The InSinkErator HWT-00 is designed for easy DIY installation under your sink. Ensure you have a standard under-sink outlet available for the tank's power cord.
Installation Steps Overview:
- Prepare the Area: Clear the under-sink cabinet space. Ensure access to cold water supply and a grounded electrical outlet.
- Mount the Tank: Securely mount the tank in an upright position within the under-sink cabinet. The tank features tool-free connections for convenience.
- Connect Water Lines: Connect the cold water supply line to the tank's inlet. Connect the hot water outlet from the tank to your instant hot water faucet (sold separately). Ensure all connections are secure to prevent leaks.
- Install Faucet (if applicable): If installing a new faucet, follow the faucet's specific instructions. The HWT-00 is compatible with all InSinkErator instant hot water faucets.
- Connect Power: Once all water connections are secure and the tank is filled with water, plug the tank's power cord into the standard under-sink outlet. The unit includes dry start protection.
- Flush the System: Before first use, flush the system according to the faucet's instructions to remove any air and ensure proper operation.
Visual Guide: Installation Components

Image: The InSinkErator HWT-00 Instant Hot Water Tank, showcasing its compact design suitable for under-sink installation.

Image: A close-up of the InSinkErator HWT-00 tank, highlighting its adjustable temperature dial for precise heat control.
Operating Instructions
Your InSinkErator HWT-00 Instant Hot Water Tank is designed for simple operation, providing near-boiling water on demand.
Temperature Adjustment:
- The tank features an easily adjustable thermostat. Locate the temperature control knob on the front of the tank.
- Turn the knob to adjust the desired water temperature. The manufacturer's recommended setpoint is approximately 200 degrees F for optimum performance.
- Allow a few minutes for the water to reach the newly set temperature after adjustment.
Dispensing Hot Water:
- To dispense hot water, activate your compatible InSinkErator instant hot water faucet (sold separately) according to its specific operating instructions.
- The tank will continuously supply near-boiling water as long as the faucet is activated, up to its 2/3-gallon capacity.
Usage Examples:

Image: A person filling a teapot with hot water from an instant hot water faucet, demonstrating its use for hot beverages.

Image: A person preparing a baby bottle with hot water from an instant hot water faucet, highlighting its convenience for quick tasks.

Image: A person filling a cooking pot with hot water from an instant hot water faucet, illustrating its use for accelerating cooking processes.

Image: A person cleaning a bowl with hot water from an instant hot water faucet, showing its utility for cleaning and sanitizing.
Maintenance
Proper maintenance ensures the longevity and optimal performance of your InSinkErator Instant Hot Water Tank.
Water Filter Compatibility:
- The HWT-00 tank is compatible with InSinkErator under-sink water filtration systems (sold separately).
- Using a compatible filter can help reduce contaminants like PFOA/PFOS, herbicides, pesticides, VOCs, lead, mercury, asbestos, chlorine, and more, improving water taste and quality.
- Refer to your filter system's instructions for recommended replacement schedules, typically every 6 months.
Troubleshooting
If you encounter issues with your InSinkErator Instant Hot Water Tank, please refer to the following common troubleshooting tips:
- No Hot Water:
- Check if the unit is plugged into a working electrical outlet.
- Ensure the temperature control knob is set to a desired hot temperature.
- Verify that the water supply valve to the tank is fully open.
- Allow sufficient time for the tank to heat water, especially after initial setup or if the tank was recently drained.
- Water Not Hot Enough:
- Adjust the temperature control knob to a higher setting.
- Ensure the tank is not being overused, which might temporarily reduce water temperature.
- Leaking:
- Check all water connections for tightness. Ensure they are hand-tightened and then given an additional quarter turn with a wrench.
- Inspect hoses for any visible damage or kinks.
- If a filter is installed, ensure it is correctly seated and not leaking.
- Slow Water Flow:
- If a water filter is installed, it might be clogged and require replacement.
- Check the water supply valve for full opening.
If problems persist, please contact InSinkErator customer support for assistance.
Specifications
| Feature | Detail |
|---|---|
| Brand | InSinkErator |
| Model Number | HWT-00 |
| Product Dimensions | 6.75"W x 10.88"H |
| Capacity | 2/3 Gallon (0.67 Gallons) |
| Material | Stainless Steel Tank |
| Wattage | 750 Watts |
| Voltage | 115 Volts |
| Maximum Temperature | 210 Degrees Fahrenheit |
| Mounting Type | Internal (under-sink) |
| Special Feature | Adjustable Temperature, Dry Start Protection, Filter Compatible |
| Item Weight | 5.7 pounds |
Warranty and Support
Your InSinkErator Instant Hot Water Tank is backed by a 3-Year "We Come to You" Limited Warranty. For full details, please refer to the product warranty documentation included with your purchase or visit the official InSinkErator website.
For technical support, troubleshooting assistance, or warranty claims, please contact InSinkErator customer service.