How big is a hot water dispenser?#
An instant hot water dispenser is a tiny under-sink appliance, just 4 to 7 inches wide and 10 to 15 inches tall, with a matching faucet on the sink deck. The table below lists the instant, hot-and-cold, and filtered versions.
Hot water dispenser dimensions by configuration#
| Configuration | Width (in) | Height (in) | Depth (in) | Best for |
|---|---|---|---|---|
| Under-sink instant hot water dispenser | 4–6 | 10–14 | 4–6 | instant near-boiling water at the sink |
| Hot-and-cold water dispenser | 5–7 | 12–15 | 5–7 | both hot and chilled water at one faucet |
| Filtered hot water dispenser | 5–6 | 12–14 | 5–6 | instant hot water with an inline filter |
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Installation clearances for a hot water dispenser#
- Under-sink tank height: 10–15 in in of cabinet height the hot water dispenser tank needs below the sink.
- Faucet hole: 1–1.5 in in of sink-deck hole the hot water dispenser faucet mounts through.
- Outlet: An instant hot water dispenser plugs into a standard outlet under the sink to keep its small tank hot.
- Cold supply: A hot water dispenser taps the cold supply under the sink and heats a small tank on demand.
Will your hot water dispenser fit? Clearances and door swing#
Fitting one is mostly about the small tank under the sink and one hole up top. The heating tank needs only 10 to 15 inches of cabinet height below the basin, so it tucks beside the trap without crowding stored cleaning supplies. On the deck, the faucet mounts through a 1 to 1.5 inch hole — often an existing sprayer or soap-dispenser knockout — so check that a spare hole exists or can be drilled. The tank taps the cold supply line under the sink and heats a small reservoir on demand, and it needs a standard outlet nearby to keep that reservoir hot. Because everything lives inside the cabinet, there is no swing arc to plan; just leave the front of the tank reachable for the occasional filter or valve check.
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Hot water dispenser sizes by type: under-sink instant hot water dispenser, hot-and-cold water dispenser, filtered hot water dispenser#
The three versions differ by what comes out of the faucet. The under-sink instant model, 4 to 6 inches wide and 10 to 14 tall, delivers near-boiling water for tea and cooking from the smallest tank. The hot-and-cold unit is a little larger at 5 to 7 inches wide and 12 to 15 tall because it houses a chilling stage as well, giving both steaming and cold water at one spout. The filtered version, 5 to 6 inches across and 12 to 14 tall, routes the hot water through an inline cartridge for better taste. Pick by whether you want hot only, hot and cold, or hot and filtered, then confirm the tank height clears your cabinet.
Hot water dispenser dimensions: common questions#
How big is an instant hot water dispenser?#
The faucet is countertop-sized, and the tank behind it measures just 4 to 7 inches wide and 10 to 15 inches tall. It is one of the smallest plumbed appliances in the kitchen.
Will a hot water dispenser fit under my sink?#
Almost always. The reservoir needs only 10 to 15 inches of height beneath the basin and a few inches of width, so it shares the cabinet easily with the trap and shutoffs.
How tall is the under-sink tank?#
The heating reservoir stands 10 to 15 inches tall depending on model. A hot-and-cold unit sits at the taller end because it adds a cooling section.
Does a hot water dispenser need an outlet?#
Yes. A standard receptacle under the sink powers the tank so it holds water near boiling and reheats between draws. Plan for that outlet during installation.
How deep is a hot water dispenser tank?#
Front to back the tank is only 4 to 7 inches deep, so it barely intrudes into the cabinet. That slim body is what lets it share space with the plumbing.
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