Safety boundary: Permits, fuel work, venting and electrical changes vary by jurisdiction and must be included in the project scope.
Start before leakage
Record model, size, fuel, vent type, electrical circuit, installation clearances and household complaints while the current heater still operates.
Check the building constraints
Doorways, drains, ceiling height, combustion air, vent route, panel capacity and condensate disposal may limit options.
Compare total project scope
Quotes should state removal, new valves, drain pan, expansion control, venting, electrical work, permits, warranty and commissioning.
Future needs
Consider household size, accessibility, renovations, electrification plans and whether a heat pump or tankless unit fits the space and service capacity.
Useful questions to record
- Is the problem at one fixture or throughout the home?
- Is there active leakage or relief-valve discharge?
- What fuel, capacity and age is the unit?
Related guides
Tank, Tankless and Heat-Pump Water HeatersA Canadian comparison of storage tanks, on-demand systems and heat-pump water heaters.Sizing a Water HeaterHow first-hour delivery, recovery and peak demand matter more than tank volume alone.No Hot Water or Inconsistent TemperatureSafe observations that distinguish whole-house, fixture and capacity problems.Water Heater Leaks and MoistureHow to identify the source area and protect the building without unsafe repairs.