Best Under Sink Water Heater Review

Also known as point of use and under counter - for instant hot water

The Advantages 

• It reduces your heating cost up to 50% and reduces used energy and water waste.

• The unit saves you money as it eliminates the need for expensive recirculating lines or pumps.

• Under sink water heater saves water efficiently as it is used where it is needed, at the point of use; kitchen sink, bathroom, laundry, garage, small cabins, boats and RVs, offices...

• Under the sink water heater serves one or two faucets max. mainly for doing dishes, hand washing or shaving.

• You can choose one of the two different types; tank-type or tankless. Tank type has a limited tank size, usually from 2 gallons while tankless provide an unlimited water supply but with the restricted flow. Tankless models are heating water instantaneously as it flows through the unit and there is no stand-by heat loss.

• Under sink water heater is a small, lightweight and compact unit that doesn't occupy too much of the space.

• It’s easy to install since it comes with the quick installation guide.

• They can be wall mounting or floor standing.

• Under sink water heater is very reliable, safe and energy efficient.

• It has a compact body and other easy-to-use features.

• They offer safety feature for reliable and safe operation.

• Desired temperature of the outgoing water can be set by using the temperature dial.

Buying and Installation tips 

• Water flow rate (bathroom faucet allows an average 0.5 gpm; shower 1.5 to 3.0 gpm).

• Incoming water temperature.

• Activation flow rate.

• Heating power in kW.

• Available features such as the modulation, conveniently located thermostat, relief valve for safety.

• Price and warranty.

• Get the place you want to install the appliance ready. The unit should be mounted closer to the fixture; under the sink, under the countertop or in the cabinet. Make sure to allow proper clearance for correct draining, maintenance and service.

• Gather your installation tools; required tools are usually recommended in the manufacturer's manual: adjustable wrench, screwdrivers, level...

• Prepare and remove all the necessary plumbing components.

• Follow the quick installation guide in the manual that comes with the appliance. Designate electrical outlet might be needed. Follow the steps for plumbing connections.

• The water heater should have T&P valve installed.

• Remove all debris and air. You have to do this after filling the appliance with water. You have to run the faucet for some minutes in order to get rid any air bubble in the water heater. Never put the heater ON unless you have filled it with water.  If you do, serious damage might result.

Popular Under Sink Water Heater 

• Ariston offers an elegant and modern Italian design with a space saving size.

• Superior insulation provides higher efficiency.

• Simple installation under the sink; it mounts on the cabinet wall or floor.

• Ideal electric unit for one sink.

• It uses one heating element with the power of 1.5 kW. Recovery rate is 7 gallons per hour.

• Temperature range is from 65 to 145 F.

• 6-year warranty on the tank.

• Price: $170.

• Chronomite

• Eemax

• Rheem

• Reliance

• Stiebel Eltron Tempra

• Titan

• Hubbell