InSinkErator hot water dispensers are dedicated under-sink electric tankless heaters paired with a chrome dispenser faucet at the sink. The system delivers near-boiling water (190–200°F) instantly at the dispenser tap — designed for tea, instant soup, blanching, and other applications where instant near-boiling water adds kitchen convenience.
How the system works
A small 2/3-gallon (or 4-cup on premium models) tank under the sink maintains water at near-boiling temperature using a 750–1000W electric element. The chrome dispenser tap at the sink has a spring-loaded handle — pull it to dispense, release to stop. The system is plumbed to cold water supply (refills automatically) and connects to a 120V outlet under the sink.
InSinkErator hot dispenser models
- HC1100: hot only, 2/3-gallon tank, $200–280 typical
- HC2200: hot only, larger capacity, premium chrome
- HC-Wave Hot/Cold: dual hot and chilled water, integrated chiller
- HC-View Series: with viewing window showing water level
Where hot dispensers earn their keep
If you regularly: drink hot tea, eat instant soup, prepare instant coffee, blanch vegetables, clean greasy dishes with hot rinse, or descale small appliances — a hot dispenser saves the time of boiling a kettle multiple times per day. For households where these activities happen 3+ times daily, the convenience compounds. For occasional use, a kettle is the simpler and cheaper choice.
Installation requirements
Under-sink space: roughly 7"D × 11"W × 14"H clearance for the tank unit. Existing or new hole in countertop for the dispenser tap (typical 1-3/8" diameter — may use existing soap dispenser hole). Cold water supply line with tee for the dispenser feed. 120V outlet within reach (5-foot power cord standard).
Common installation mistakes
- Sharing cold water line with refrigerator water line — fluctuating pressure causes hot dispenser cycling
- Mounting the tank above the dispenser tap — defeats gravity flow, requires pumped models
- Skipping the supply shutoff valve — needed for future service
- Insufficient electrical capacity — verify circuit before plugging in (1000W draws ~8.5A)
Temperature setting
InSinkErator dispensers have adjustable temperature, typically 160–210°F. Default factory setting is around 195°F (just below boiling). Adjust based on use:
- 205–210°F: for instant tea/coffee (high enough to actually brew)
- 190–200°F: default; safe for most uses
- 170–180°F: for households with young children — still hot enough for warm beverages, less scald risk
Maintenance
Quarterly: drain and flush the tank to remove mineral buildup, especially in hard-water areas. Annually: replace the inline filter (if equipped). Every 3–5 years: replace the tank's anode rod if accessible (some models have replaceable anodes). Tank typically lasts 7–12 years; element replacement is a common repair at year 4–6.
Filtration upgrade
Many users add an under-sink filtration cartridge upstream of the dispenser feed. This prevents mineral scaling inside the tank and improves taste of the dispensed water. Adds $40–80 in initial cost; filter cartridge replacement $20–30 every 6 months.
InSinkErator vs Waste King vs Bunn
InSinkErator is the residential market leader for hot dispensers in the US. Waste King offers competing products at slightly lower price points. Bunn produces commercial-grade hot dispensers at higher prices for restaurants and offices. For residential kitchen use, InSinkErator is the default choice.