A hot water heater rarely dies at a convenient moment. That is how people end up buying whatever the supplier has in the van. Worth thinking about before that day arrives. Replacing a hot water heater North Shore homes rely on comes down to three decisions. The existing installation makes most of them for you.
What size system does the house need?
Enough capacity to cover the busiest hour, not the whole day. A storage unit that runs out mid-shower is undersized for the peak rather than the total. Household size gives the rough guide. So does the number of showers that happen back to back. Continuous flow units sidestep the question, since they heat on demand instead of storing. They do need the gas or electrical capacity to do it.
Which type suits the property?
Usually whatever the property already runs. Electric storage costs the least to buy and the most to run. Gas storage and continuous flow suit homes already on reticulated gas, meaning a mains gas connection. Heat pumps work like a reverse-cycle air conditioner, pulling heat out of the air rather than making it, and they draw a fraction of the power of an element. Solar needs north-facing roof space, plus a booster element for cloudy weeks.
What does the existing space allow?
More than most people expect, and less than they hope. Plenty of older North Shore homes keep the unit in a tight external cupboard or a narrow side path. That rules out a physically larger tank. Heat pumps need clear air around them and they make some noise, so a spot under a bedroom window is a poor choice. Swapping type often means moving the unit, and moving the unit means new pipework.
What has to comply when a new unit goes in?
Several things, and a plumber handles all of them. NSW sets installation requirements for temperature control devices on heated water services. That is the valve that blends stored hot water down to a safe delivery temperature at bathroom fixtures. Advisory guidance for heat pump and storage installations also covers the relief drain, the pipe that carries water off when the safety valve vents. It has to fall continuously to its discharge point and finish 75 to 300 mm above a drainage fixture. The tank needs a level, stable and impervious base under it as well.
When is it worth replacing rather than repairing?
When the tank itself has gone, or when a second failure arrives inside a year. A leaking element or a failed thermostat is a repair. A rusted seam is not. Age is a guide rather than a rule. The more useful question is whether parts are still made for the model. There is more on the early warning signs in what usually fails on a hot water unit.
Who should you call about a hot water heater on the North Shore?
Someone who sizes it before quoting it. Sweeney’s Plumbing installs electric, gas and solar systems across the North Shore and works from the Turramurra office. Every job starts with a free estimate rather than a surprise. The gas side needs a licensed gas fitter regardless of who supplies the tank, and NSW requires a licence for any plumbing, draining or gasfitting work, whatever it costs.
Still getting hot water but watching the unit closely? Call the office on 1800 219 682. Or send the brand, model and rough age through the contact page and we will tell you what your options look like.
