Skip disability assistance statement.

Welcome to our website! As we have the ability to list over one million items on our website (our selection changes all of the time), it is not feasible for a company our size to record and playback the descriptions on every item on our website. However, if you have a disability we are here to help you. Please call our disability services phone line at 800-288-5899 during regular business hours and one of our kind and friendly personal shoppers will help you navigate through our website, help conduct advanced searches, help you choose the item you are looking for with the specifications you are seeking, read you the specifications of any item and consult with you about the products themselves. There is no charge for the help of this personal shopper for anyone with a disability. Finally, your personal shopper will explain our Privacy Policy and Terms of Service, and help you place an order if you so desire.

Insinkerator 42790A

Mounting Extension for Involve Hot Water Dispensers

Call us for our lowest price guaranteed

The InSinkErator Extension for Involve Hot Water Dispensers allows the hot water dispenser to be installed in solid-surface countertops with a maximum thickness of 3 in. The extension includes a plastic stem and mounting nut that can be simply threaded on and off to adjust to varying countertop thickness. The plastic stem and mounting nut come pre-installed on the instant hot water dispenser for quick and easy installation.


  • Black plastic construction
  • Includes a plastic stem and mounting nut
  • Comes pre-installed on all Involve Series models
  • Works with most solid-surface countertops up to 3 in. thick; compatible with multiple types of countertops