2.5 gallon mini-tank water heater, perfect for point-of-use and garage applications.
Waiwela Mini Tank heaters combine quality materials with efficient manufacturing techniques to provide an affordable solution to a common problem. Every day, millions of gallons of fresh water is wasted waiting for hot water to reach the faucet or shower. Installing a Waiwela Mini tank heater under your sink eliminates the wait and reduces fresh water waste.
• CFC free
• Glass-lined tank
• Floor or wall mount
• Attached 3' power cord with two-prong plug
• Install at point-of-use
• Under sink installation
• Available in 1, 2.5, 4 and 6 gallon capacities
• Adjustable thermostat with overheat protection
• Pressure release valve (T&P valve) can be replaced with any one that is rated for 150 psi, 210°F, 3/4" thread
||50°F - 140°F
|Power at 120 VAC
|Recovery at 90°F Rise
| Pressure Relief Valve
|Height (housing only
not including water connections)
|Height (including PRV at top)
|Depth including dial
** Example: The WM-2.5 has a 2.5 gallon capacity. At 6.5 gallons per hour, it will take 23 minutes for the tank to heat 2.5 gallons from 50°F to the unit's maximum temp of 140°F.
• Maintenance closet
• Any under-the-sink application
• 2 Year warranty on parts
• 6 Year limited warranty on tank
• User manual
Frequently Asked Question ("FAQ")
Q1: What are the temperature settings on the dial?
A1: The dial has four positions: Snowflake (*), 1, 2, 125°F, and Max.
≈ The Snowflake setting is 50°F. This setting will protect water in the tank and pipes inside the unit from freezing.
≈ The 1 setting is approximately 105°F, but can vary a few degrees.
≈ The 2 setting is approximately 113°F, but can vary a few degrees.
≈ The Max setting is 140°F.
Q2: How long will the hot water last until running out?
A2: The answer depends on a few factors:
• your incoming cold water temperature
• the tank temperature setting (which can be set from 60°F to 140°F)
• the flow rate of the point of use. For example, if you are using it with a kitchen sink, then the flow rate is typically 1.25 GPM. If bathroom sink, then the flow rate is typically 0.5 GPM, less than half of a kitchen sink, and makes a big difference.
• how much cold water you are mixing in to get your preferred output temperature
Let's assume that your incoming water temperature is 70°F, tank temperature setting is at the maximum 140°F, it is installed under a kitchen sink, and you are mixing cold water at the faucet to get a skin-comfortable output temperature of 105°F (not scalding hot 120°F for example). Given all that, then the hot water will last about 2.5 minutes.