CAMPLUX ME40 4-Gallon Electric Mini-Tank Water Heater, 1440W, 120V

If hot water takes time to reach a sink, a point-of-use heater can bring a compact supply closer to the tap. The CAMPLUX ME40 stores up to 4 gallons and is designed for installation under a sink or counter, helping make hot water available where it is used rather than relying solely on water travelling from a more distant heater. Its 1440W heating element runs on 120V power, and the insulated tank helps reduce heat loss between uses.

Choose the ME40 for a kitchen, bathroom vanity, garage sink or another isolated water point where a mini-tank format suits the space and plumbing setup.

What to know

The 4-gallon tank combines local hot-water storage with a thermostat control and three temperature settings. This gives you a way to adjust the water temperature for everyday sink use. The tank can be mounted on a wall or placed on the floor or a shelf, so its location can be matched to the available under-counter or utility space. The listed dimensions are 29.8W x 48.9H centimetres, with a depth of 10.38 inches.

For installation, the heater connects to a cold-water line using 1/2-inch NPT water connections and can be set up as an independent point-of-use unit or in-line with a larger hot-water source. It uses a 120V outlet. A T&P relief valve and mounting kit are included, and the product is described as UL listed. Buyers often praise the compact size and the supply of hot water at the tap, some also report leaks, including around the pressure relief valve. These experiences are useful context when planning placement and checking connections during installation.

Tips for day-to-day use

Set the thermostat to a temperature that suits the task, then use the nearby tap as you normally would. The built-in insulation is intended to reduce heat loss, while the stored water helps avoid waiting for hot water to travel from a remote source. For a kitchen or bathroom installation, position the unit close to the sink and make sure the chosen wall, floor or shelf placement works with the water-line connections and included mounting hardware.

The heater is a practical alternative to depending only on a distant main heater for every tap: it keeps a small hot-water supply at the point of use. A kitchen sink used intermittently, a bathroom vanity or a garage handwashing station are straightforward applications. For plumbing work, connect it to the cold-water line as directed and account for the supplied T&P relief valve in the installation.

Usage tips

Before choosing a location, consider both the available space and how the heater will connect to the sink’s plumbing. The product can be wall- or floor-mounted, with shelf placement also described, so you can adapt the setup to the cabinet or utility area. A 28–31-inch cord is listed, plan the position around access to the stated 120V outlet as well as the water connections.

Use the adjustable thermostat to select among its three temperature settings, and keep the unit accessible for routine checks of its plumbing connections. This is especially useful in a compact under-sink installation, where thoughtful placement makes the hot-water source easier to reach and maintain.

Is it worth it?

The CAMPLUX ME40 is a considered choice when the priority is hot water close to one sink, without waiting for it to travel from a larger, more distant source. Its 4-gallon capacity, compact mini-tank format, flexible mounting options and adjustable thermostat support that specific job. For a kitchen, bathroom vanity or utility sink with a suitable 120V connection and plumbing setup, it provides a focused point-of-use solution with insulation and a supplied T&P relief valve as part of the package.