Saving Water at Home: Practical Tips

Johannesburg sits in a water-scarce region, and the municipal system has real vulnerabilities — the city’s reservoir buffer covers roughly 27 hours of citywide demand, which leaves little room when something goes wrong. Saving water at home is not about guilt; it is about making your household less exposed and your spending more deliberate. The tips below are ranked roughly by impact, so you can start where it matters most.

Fix Leaks First — They Dwarf Everything Else

Before you change a single habit, walk your property and check for leaks. A dripping tap or a running toilet cistern can waste a significant volume of water continuously, day and night, without anyone noticing. Check your meter reading before bed, use no water overnight, and read the meter again in the morning. Any movement means you have a leak somewhere.

Common culprits:

• Toilet cisterns — put a few drops of food colouring in the cistern; if colour appears in the bowl without flushing, the flapper valve is leaking.
• Garden irrigation fittings — joints and micro-spray heads crack over time.
• Geyser pressure-relief valves — a valve that drips constantly needs replacing.

Leaks are the highest-return fix available. Deal with them before anything else.

Toilets and Bathrooms: Where Most Indoor Water Goes

South Africans use on average about 237 litres of water per person per day — well above the global average of around 173 litres. A large share of that happens in bathrooms.

Toilets

• If you have an older single-flush cistern, fit a dual-flush conversion kit. It is inexpensive and cuts flush volume substantially.
• Do not use the toilet as a bin. Every unnecessary flush is wasted treated water.

Showers and baths

• Showers use less water than baths for most people, but a long shower with a high-flow head erases that advantage quickly.
• Fit a water-efficient showerhead. Low-flow models are widely available and most people cannot tell the difference in practice.
• A four-minute shower target is a reasonable household norm to aim for.

Basin taps

• Fit aerator inserts on basin taps. They cost very little and reduce flow without reducing perceived pressure.
• Turn the tap off while brushing teeth or lathering hands.

Kitchen and Laundry

Kitchen

• Run the dishwasher only when full. A full cycle on a modern dishwasher typically uses less water than washing the same load by hand under a running tap.
• Defrost food in the fridge or on the counter rather than under running water.
• Keep a jug of drinking water in the fridge so you are not running the tap waiting for it to cool.

Laundry

• Run the washing machine with full loads. Half-load settings on many machines still use a disproportionate fraction of the water.
• If you are replacing a machine, front-loaders generally use less water than top-loaders of equivalent capacity — worth factoring into your purchasing decision.

Garden and Outdoor Use

Garden irrigation is often the single largest consumer in a Johannesburg household, particularly in the dry winter months when lawns and gardens need supplemental watering.

• Water in the early morning or evening — midday watering loses a significant portion to evaporation before it reaches roots.
• Check your irrigation controller — many households run programmes set years ago that no longer reflect actual plant needs or seasonal conditions. Audit it seasonally.
• Replace spray irrigation with drip systems where feasible. Drip delivers water directly to root zones and loses far less to evaporation and overspray.
• Mulch garden beds — a layer of mulch around plants retains soil moisture and reduces how often you need to water.
• Rethink your lawn — lawns are high consumers. Indigenous or water-wise ground covers, or a smaller lawn area, can reduce outdoor consumption meaningfully over time.
• Collect grey water from the shower for garden use. A simple bucket in the shower while it warms up captures water that would otherwise go straight to drain.

If your garden irrigation is driving your bill up and you are thinking about a borehole or rainwater system to supplement supply, it helps to know what the full cost looks like. Compare 3 free quotes — vetted installers, no obligation.

Hot Water and Your Geyser

Geysers are significant energy users, but they also affect water consumption — people run taps waiting for hot water to arrive, which wastes cold water straight to drain.

• Insulate your geyser and the first metre or two of the hot-water pipe leaving it. This keeps the water in the pipe warmer for longer and reduces the wait at the tap.
• Consider a timer or smart controller on your geyser so it heats water shortly before you need it rather than maintaining temperature continuously.
• If your geyser pressure-relief valve drips, get it replaced — it is wasting treated water constantly.

Rainwater Harvesting and Greywater Reuse

Once you have addressed leaks and habits, you may want to look at supplementing your supply. Rainwater harvesting — collecting roof runoff into storage tanks — is straightforward to install and suits Johannesburg’s summer rainfall pattern reasonably well. Collected rainwater can cover garden irrigation and, with appropriate filtration, toilet flushing.

Greywater systems recycle water from baths, showers, and basins for garden or toilet use. These require proper installation to avoid hygiene problems, but they can reduce your reliance on municipal supply meaningfully.

For a broader picture of household water resilience options — including tanks, boreholes, and what different systems actually cost — the WaterQuotes resource hub covers the full range in plain terms.

Thinking about a rainwater tank or backup system for your property? Get three installer quotes — free, no obligation, and you can compare them side by side.

Building Habits That Stick

Most of the tips above are one-time changes — you install a dual-flush kit, fit aerators, adjust the irrigation controller, and the saving happens automatically from that point forward. That is deliberate: relying entirely on daily willpower does not work long-term.

The habit changes that do stick tend to be simple and visible — a four-minute shower timer on the wall, a bucket in the shower, a full-load rule for the washing machine. Build the physical reminder into the environment, and the behaviour follows.

Johannesburg’s water infrastructure is under pressure. The more your household can reduce its baseline consumption and build a small buffer, the less a supply interruption disrupts daily life. Start with the leak check tonight — it costs nothing and takes ten minutes.