Instant Hot Water Dispenser Buying Guide

When shopping for an instant hot water dispenser, buy smart! Be sure you’re aware of the range of products available and how to make the right choice.    


A sink-top dispenser can deliver both piping hot and icy cold water.

For today’s fast-paced, dinner-in-an-hour kitchens, hot water dispensers are the epitome of convenience, accelerating all kinds of kitchen tasks: preparing hot drinks, soups, gelatins, sauces, and cereals; thawing juices; pre-heating water for cooking; warming baby bottles; even melting wax or purging berry stains from clothing. They take the lag time and the hassle out of these and many other tasks that would otherwise require boiling water on the stove.

Instant hot water dispensers come in two main types:

• Instant hot water tank-style dispensers with sink-top spouts

• Countertop electric kettles and dispensers

Instant Hot Water Tank-Style Dispensers

These point-of-use water heaters consist essentially of a miniature electric water heater and storage tank mounted beneath the sink and connected to a small sink-top spout. Many are also connected to a water filter, and some models deliver both hot and cold water at the sink.

A tank-style hot water dispenser is one of those items that you might as well buy online—appearance doesn’t really matter much because the tank is hidden under the sink, and it’s easy to quickly compare specifications online. Furthermore, online prices tend to be significantly lower than retail store prices, and you can save a trip to the home center by having the small appliance delivered. On this page, you’ll find links to Amazon, where you’re likely to find some of the best prices.

Products sold by different manufacturers are very similar. They have an interior tank that holds water, and a heating element that heats the water. Types with a stainless steel interior tank will last longer than those with a rubber bladder tank (lowest price models).

A control dial allows you to tweak the temperature. They have a thermostat that automatically shuts off the heating element when the water in the tank reaches the set temperature. For more about how they work, see How a Hot Water Dispenser Works.

The most common part to fail is the thermostat. If it goes out, fixing the problem is more hassle than it’s worth, so you’re better off just replacing the unit if or when this happens. Thanks to quick-connect couplings, you can usually change-out a water dispenser tank in less than an hour.

instant hot water dispenserInSinkErator

This top-rated instant hot water dispenser tank includes an inline filter.

Tanks vary in size and by the heating elements’ wattage. Most are 1/3- or 1/2- gallon and range from 500 to 1,300 watts. A 750-watt, 1/2-gallon tank will produce up to 60 cups of hot water per hour. Higher wattage tanks can deliver up to 100 cups. Most makes have a dial for fine-tuning the temperature up to 190 degrees F, and must be plugged into a 120-volt electrical receptacle.

instant hot water dispenser tank and spoutWaste King

Waste King instant hot water dispenser with a sink-top spout.

Given the similarity of products, when shopping for a new instant hot water dispenser, focus on price, availability, and warranty. Note that the price often does not include the sink-top spout.

Popular makes available on Amazon include: Everpure, Waste King, and InSinkErator.

A best seller is the InSinkErator HWT-F1000S (shown above), which has a stainless steel tank and also a filter that connects to the faucet. Online price is about $235. Tank warranty is for 3 years.

Many styles of sink-top spouts are available, from low spouts with handles you twist to tall, gooseneck units that allow plenty of room for filling tall cups and kettles. Chances are good that you can find a dispenser to match the look of your sink fixtures. Typical finishes include white, black, almond, chrome, satin nickle, and brass.

instant hot water dispenserEverpure

Everpure instant hot water dispenser tank goes in the cabinet under the sink.

Some units, such as KitchenAid’s and Whirlaway’s, have a twist grip that releases water with a quarter turn. Others, such as InSinkErator’s, have a lever release. Elkay’s spouts, which tout “no lead” construction, have a button on top. Franke makes the smartly styled Little Butler, which has a tall, L-shaped spout and a lever handle.

Some manufacturers—Franke and InSinkErator to name two—offer models that dispense both hot and cold water through one faucet. The cold water side can be connected to a chiller, or both supplies can be hooked up to a water treatment system. This type of faucet eliminates the need for yet another spout—the purified cold water spout—at the sink.

For sinks that don’t have the needed mounting hole for a new faucet, replacing a purifier spout with one of these is the perfect solution.

To install one of these yourself, see How to Install a Hot-Water Dispenser.

If you want instant hot water but you don’t want to mess with the plumbing, see Countertop Instant Hot Water Kettles & Appliances.

Join the Conversation

  • Karen Fender

    InSinkErator HWT-F1000S may be a best seller, but if your read the consumer reviews, they are not good.

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