Water that is stored too cool can raise bacterial concerns. Water delivered too hot can scald, especially children and older adults. A storage tank’s setting and the temperature at a shower or tap are not the same thing.
Balance storage and delivery
Health Canada advises setting a water heater to 60°C to reduce the growth of harmful bacteria, and using suitable mixing or anti-scald valves to limit water at fixtures to 49°C. The correct arrangement depends on the appliance and the plumbing in your home.
Do not lower a tank’s setting simply to make a shower more comfortable without understanding the effect on stored water. Likewise, a hotter tank is not a reason to leave taps unprotected.
Ask for a system check
If water at the tap is suddenly hotter or colder than usual, or a mixing valve does not seem to work, note which fixtures are affected. Our water-heater team can review the heater, controls and delivery temperature with you.
Check the whole path to the fixture
A heater setting alone does not tell you the temperature someone receives at a shower. Mixing valves, fixture controls and the plumbing between the tank and tap affect delivery. If one shower suddenly becomes too hot while other fixtures are normal, describe that difference. If all hot taps change, mention it as well. A technician can check the heater and the mixing arrangement rather than adjusting one control by guesswork.
For households with children or anyone more vulnerable to scalding, ask whether the anti-scald protection is present and working. Health Canada’s guidance separates the 60°C storage target from the 49°C fixture-delivery limit. Avoid changing settings without confirming how your system manages both. Our water-heater service can discuss the arrangement installed in your home.