Signs you need this
- Rusty or rotten-egg smelling hot water
- Rumbling or popping from the tank
- Water around the base pan
- Showers going lukewarm halfway through
Kit on the van, and the method
- Combustion analyser and manometer for gas units
- Multimeter for elements and thermostats
- Drain hose and flush pump
- T&P valve, dielectric unions, venting parts
Before we leave: Fire the unit, check gas pressure or element draw, and time a full-temperature tap.
When electric makes sense
Rural properties north of Brooklin often lack a natural gas line. Condo townhouses and finished basements sometimes have no route for a flue. In those cases an electric tank avoids venting entirely, needs no combustion air, and can sit closer to the fixtures it serves. Electric units recover more slowly than gas, so sizing deserves attention in a busy household.
Element and thermostat basics
A typical residential electric tank uses two heating elements, one near the top and one near the bottom, each with its own thermostat. The two do not usually run together. The upper element heats the top of the tank first so hot water is available quickly, and then control passes to the lower element to heat the rest. When a family complains of a short burst of hot water followed by lukewarm, the lower element or its thermostat is often the cause.
Elements are replaceable, and on a younger tank a repair is often the sensible call. On an older tank with sediment and corrosion, a new installation tends to be the better use of money. Our field note on water heater lifespan covers how to weigh that.
Circuit needs
An electric water heater draws significant current and needs a dedicated 240-volt circuit with the breaker and wire sized to the unit's rating. When we replace a like-for-like tank, the existing circuit usually suits it. When we convert from gas to electric, or install a larger tank, the panel needs capacity for the new load. Electrical work of that kind belongs to a licensed electrician, and we coordinate with one rather than improvise.
Placement
- Floor drain or pan. A tank eventually leaks. A catch pan plumbed to the floor drain keeps a failure contained.
- Service clearance. Element covers must be reachable, and the drain valve needs room for a hose.
- Relief valve discharge. The temperature and pressure relief line must run down to a safe point near the floor.
- Expansion control. Homes with a check valve or pressure reducer on the main line usually need an expansion tank.
We also look at how far the tank sits from the main bathroom. Distance from tank to tap is time spent waiting for warmth, and sometimes moving the tank a few metres during installation is worth discussing.
The installation itself
We shut off water and power, empty the old heater and haul it out, stand the replacement in place, connect supply lines with unions, install the relief discharge and expansion tank where needed, fill the tank completely before power is restored, and check every joint. We haul away the old unit. If you are deciding between a tank and an on-demand unit, compare our tankless page before choosing.
Asked on the phone
Is an electric water heater more expensive to run than gas?
Running cost hinges on your hydro and gas prices plus how much hot water the family uses. We can explain the trade-offs, but we do not quote running costs we cannot verify for your home.
How long does an installation take?
A like-for-like swap usually takes a few hours. Conversions from gas take longer because of the electrical work and capping the old gas line.
Do I need a bigger tank?
If you regularly run out of hot water, possibly. Electric tanks recover slowly, so going up a size often helps more than it would with gas.
