CHECK THE CONCENTRATION OF THE WATER HEATER FLUID.
caution
If the concentration of the water heater fluid is less than 30%, the rust-resistance effect is reduced. If it exceeds 60%, the antifreeze effect and heating capacity are deteriorated, affecting the heater adversely. Therefore, observe the service concentration range without fail.
Using a hydrometer, check if the water heater fluid concentration is within the standard value range.
Standard value: 30 to 60% (service concentration range)
