Author name: admin

Gas and electric hot water systems differ in how they heat water, how much they cost to run, how quickly they recover, and what space and maintenance they require.  Understanding these differences helps you make the right choice. Because the system you choose directly affects your energy bills, whether you have uninterrupted hot water during peak times, and how well your setup holds up during Townsville’s storms and power outages. In this guide, we’ll break down how each system works and compare them across upfront and running costs, and long-term use, so you can see clearly which option fits your household without second-guessing your decision. TL;DR Gas vs. Electric Hot Water Systems: Quick Overview Before we dive in, a quick note on what we’re comparing here. While both gas and electric systems come in different types, gas systems are typically installed as instantaneous (continuous flow) units, while electric systems are more commonly used as storage tanks. That’s why this guide focuses on comparing gas continuous flow systems with electric storage systems, because this reflects the most common real-world choice for Townsville homeowners. Gas Hot Water System at a Glance A gas hot water system uses a burner powered by natural gas or LPG to heat water.  In a continuous flow gas system, since there is no storage tank, when you turn on a hot tap, a flow sensor detects the moving water and activates the burner. The water passes through a heat exchanger (a series of copper coils) positioned above the flame. The heat is transferred directly to the water as it flows through, so it is heated within seconds before reaching the tap.  These systems use electronic controls to adjust the flame based on demand. If you turn on a second tap, the control panel increases the gas flow to keep the temperature steady. Many units are factory-set to the safe temperature of 50°C, often removing the need for an external tempering valve to mix in cold water. Once the tap is turned off, the sensor detects the flow stop and shuts down the burner immediately, so energy is used only when hot water is actually needed. Electric Hot Water System at a Glance An electric hot water system heats water using immersed heating elements inside a storage tank.  Cold water enters the tank through a dip tube and settles at the bottom, where a heating element is placed. When the thermostat detects that the temperature has dropped below 60°C, which is the minimum storage temperature required under Queensland regulations to prevent bacterial growth, it switches the heating element on to heat the water. The heated water rises to the top of the tank and is drawn out when you open a tap, while fresh cold water flows in, and the cycle continues. Because water is stored at high temperatures, a tempering valve is installed to mix in cold water before it reaches your taps, delivering water at a safe temperature of 50°C to prevent burns. Upfront Investment: What You’ll Pay to Buy and Install Gas Continuous-Flow System Typical installed cost: $1,800 – $3,500 Gas systems are slightly more expensive upfront because they require specialist installation to manage high-intensity burners and exhaust. Costs include: Electric Storage System Typical installed cost: $1,500 – $3,000 Electric systems are cheaper upfront because most Townsville homes already have the wiring and space for a tank. Costs typically include: When Switching Fuel Types Gets Expensive You can see that gas and electric systems both fall into almost the same cost bracket, with a difference of only a few hundred dollars, but this is for a like-for-like replacement. If you change systems and fuel types, the total cost can rise quickly. Running Costs: What You Pay Over Time In Townsville, running costs vary between the two systems depending on your energy rate and daily hot water usage. You can expect to pay:  Gas Continuous-Flow System Annual running cost: $400 – $1,000 Gas costs vary depending on how the gas is supplied. For homes connected to natural gas, you pay a daily supply charge of about $0.80–$1.10. This is a fixed cost just for being connected, which adds $300–$400 per year, even if you use very little gas. On top of that, you also pay for the gas you actually use.  For homes using 45 kg LPG cylinders, a four-person family typically uses 3-5 cylinders annually. Each refill and delivery costs between $120 and $170 per cylinder, and you also pay cylinder rental of about $45–$55 per bottle annually. Altogether, this brings total yearly costs to around $800–$1,000. This makes gas a premium choice for many Townsville households. Electric Storage System Annual running cost: $600 – $900 This estimate covers a typical four-person household using a 250–315 L tank, which uses around 3,300 kWh per year. If your home has solar panels, costs can drop even further. By using a timer or solar diverter, you can heat water during the middle of the day when your system is generating excess power and store it for later use. So, there is no need to purchase electricity from the government grid.  So, gas systems are only cheaper when electric systems use the standard tariff 11. However, when you move to Tariff 33 or use solar, electric storage becomes the more economical choice.  Hot Water Performance & Recovery: How Fast You Can Get Water Performance refers to how quickly a system can deliver hot water and how long that supply lasts during peak use. The recovery rate is how fast the system can heat water again after it has been used. Gas Continuous-Flow System Gas systems are the higher-performance option because a gas burner produces a strong, concentrated flame that transfers heat directly through a heat exchanger, which lets the system heat water very quickly and deliver it within 10 to 15 seconds of turning on the tap. For continuous-flow units, the recovery rate is not really a limitation. Water is heated as it passes through the unit,

Whether you can repair your hot water system’s leak or not comes down to what’s actually causing it. Some issues, like loose pipe connections or a worn valve, are quick and affordable to fix. Others, like a corroded or cracked tank, mean the system itself is failing and needs replacing. In this guide, we’ll walk you through what to do as soon as you notice a leak, how to figure out what’s causing it, and how to decide whether a repair will do the job or if it’s time for a new system. TL;DR What to Do Immediately When You Notice a Leak How Leak Location Helps You Diagnose the Problem Once things are under control, you can take a closer look at where the water is actually coming from. This is important because the location of the leak tells you two key things:  Here’s what each location tells you: Water Pooling at the Top If water is pooling around the top of the tank, it mostly comes from the pipes and fittings attached to the tank’s top. These connections handle the flow of hot and cold water in and out of the unit, and if they become loose or the seals wear out, water can escape. Because these components are external and easy to access, leaks here are generally minor and fixable.  Water Running Down the Side When water runs down the side of the tank, it usually comes from safety valves attached to the side. These valves are designed to release water if the pressure or temperature gets too high.   If the valve starts opening more often or keeps dripping, it can mean the valve is worn out, or the system is under constant stress, like high incoming water pressure or overheating. The plumber will check what’s causing the valve to open and fix it accordingly.  Water Seeping from the Bottom When water pools at the base of the tank, it means the leak is coming from inside the tank itself. Most tanks have a drain point near the bottom, and if water is only leaking from this tap, it’s a replaceable part.  But if water is seeping from behind the metal casing or through the insulation at the bottom, the inner cylinder has likely corroded or cracked, which is not something you can patch up, and the tank itself has failed and needs replacing. Common Causes of a Hot Water System Leaking Now that the leak’s location has given you a clue, it’s time to figure out what’s actually causing it and how to check for sure.  Loose Inlet or Outlet Pipe Connections The pipes going in and out of your tank are one of the most common places for leaks to start. These joints are sealed with threaded fittings and small rubber washers that keep the connection watertight. Over time, the metal fittings made of copper or brass expand and contract as the water heats up and cools down. This repeated movement slowly loosens the connections. The flow of water also causes small vibrations, which weaken the joint even more. On top of that, in North Queensland, constant heat and humidity can dry out and harden the rubber washers, so they don’t seal properly anymore. Once that seal weakens or the fitting loosens, water starts to escape. How to Confirm: Wipe the tank and pipe connections dry with a cloth. Wait 10–15 minutes, then check for fresh droplets at the joint. If the water appears at the pipe but the tank surface stays dry, the leak is likely from the connection. Faulty Temperature and Pressure Relief (TPR) Valve The TPR valve is a safety device located on the side of the tank near the top. Its job is to release a small amount of water if the pressure or temperature inside the tank exceeds the safety limits of around 500 kPa or 99°C, as set by Australian standards. A few drips during the heating cycle are normal. That’s because when water heats up, it expands, which slightly increases pressure inside the tank. The valve releases a bit of water to relieve that extra pressure and keep the system safe. But if you notice a steady drip or a constant stream, something isn’t right. This can happen when: How to Confirm: Take a look at the tundish, the small drain pipe running down from the valve. If water is flowing steadily, gently lift the small lever on the valve for a few seconds to flush out any dirt or mineral bits. Then let the lever close. To check your water pressure, you can attach a simple pressure gauge to an outdoor tap or the cold-water inlet of the tank. Most homes should be around 400–500 kPa.  Leaking Drain Valve The drain valve is the small tap at the bottom of your tank, mainly used for maintenance and flushing. Over time, especially in older tanks, it can start to leak because the valve’s components – plastic or brass – wear out, or sediment and mineral buildup from the local water get stuck inside, stopping them from sealing properly, which eventually causes leaks.  How to Confirm: Take a look at the base of the drain tap. If you see a steady drip or a small puddle or notice white, chalky limescale around the opening, the valve isn’t sealing anymore.  Sediment Buildup and Internal Wear Inside your hot water tank, there’s a sacrificial anode, which is a metal rod that absorbs minerals from local water and slowly corrodes to protect the tank. But if this rod is worn out, minerals in your water (like sand, calcium, and grit) sink to the bottom.  Over time, they form a layer of sediment. The heating element sits just above or embedded in this layer, so the heat it produces doesn’t transfer efficiently into the water. That means the metal directly under the element (the tank base) takes the brunt of the heat because the sediment doesn’t conduct the heat well. Over months and

An instantaneous hot water system, also called a tankless or continuous flow system, heats water on demand instead of storing it in a big tank. That means you don’t have to wait for a big 300-litre tank to refill and reheat; just turn on the tap, and the system starts heating water right away. It’s a space- and energy-saver, and can even save you a bit on your bills. But ‘instant’ can be a little misleading. How fast the hot water actually reaches your tap and whether this type of system is right for your home depends on your house layout, how much water you use, and your plumbing setup. In this guide, we’ll break down how these systems work, how much they cost, their pros and cons, and when they make sense for your home, so you can make an informed decision.  TL;DR How Instantaneous Hot Water Systems Work When you turn on a hot tap, water starts moving through the pipe and into the hot water system. A flow sensor inside the unit detects this movement immediately and sends a signal to the electronic control unit (ECU), which acts as the system’s controller.  The ECU starts the heating process: At the same time, cold water flows into a copper pipe inside the heat exchanger. The burner or elements heat the exchanger, and that heat transfers through the copper pipe into the moving water. Because the water is constantly flowing, it heats up in seconds and continues heating as long as the tap stays on. Before the water leaves the unit, a thermistor (temperature sensor) measures the water temperature as it reaches the outlet of the unit. The system is mostly set to heat water to around 60°C in Queensland homes to prevent bacterial growth and meets Australian safety standards. If the water isn’t at that set temperature, the electronic control unit (ECU) adjusts the heat instantly by:  Once the water reaches that set temperature, it leaves the unit and travels through your pipes. Before it reaches bathroom taps, it passes through a tempering valve, which mixes in cold water to bring it down to a safer 50° to prevent burns.  Finally, when you turn the tap off, the water flow stops. The flow sensor detects this, and the ECU shuts down the burner or heating elements, and the system goes back to standby mode.  Types of Instantaneous Hot Water Systems Based on Energy Source 1. Natural Gas Systems A natural gas instantaneous system is a tankless unit connected directly to your home’s mains gas supply.  These systems can deliver high flow rates because gas burners can produce a large amount of heat very quickly. This high heat output allows the system to heat more water at once, which is why they’re commonly used in family homes with higher hot water demand. In Townsville, homes that already have a gas connection often go with this option because it provides strong, consistent hot water and is typically cheaper to run than electricity. 2. LPG (Liquid Petroleum Gas) Systems An LPG instantaneous system works the same way as a natural gas unit, but instead of being connected to a gas line, it uses gas cylinders stored outside the home. These systems are more expensive to run than natural gas because you not only pay for the gas but also for delivery, bottle refills, and rental of the cylinders. As for performance, there’s no real difference. LPG units still use a gas burner, so they can produce high heat quickly and handle high demand without a noticeable drop in temperature. This makes LPG a practical option for homes that don’t have access to mains gas, which is common in rural or outer parts of North Queensland. 3. Electric Instantaneous Systems Electric instantaneous systems use high-powered heating elements instead of a gas burner to heat water on demand. They’re smaller and more compact because they don’t need parts like a burner, flue, or ventilation, so you can easily have them installed inside cupboards, under sinks, or in tight spaces. But heating water instantly with electricity takes a large amount of energy in a very short time. A standard single-phase power supply can only deliver a limited amount of electricity at once, which is not enough to heat large volumes of water for your entire house while multiple taps are running. To handle higher demand, electric systems require three-phase power. But, most homes don’t have this by default, as single-phase is the standard for residential properties. And if you want to upgrade to three-phase, it often involves changes to the switchboard and supply connection, which is quite expensive. Because of these limits, electric instantaneous systems in Townsville are only used in lower-demand setups, like a single bathroom or a granny flat, where only a small amount of water needs to be heated at a time. Based on Heating Technology 1. Standard (Non-Condensing) Systems A standard instantaneous system is the basic gas model that heats water with a gas burner, and the hot gases created during combustion are vented straight out through a flue. Some of the heat produced in the burner escapes with those exhaust gases, which means not all the energy from the gas goes into heating your water. Because of this, these units are less energy-efficient than newer designs. These systems are popular in many older homes in Australia because they are simple and cheaper to buy upfront. 2. Condensing Systems A condensing instantaneous system is a high-efficiency version of a gas unit. It works like a standard system but with one key improvement: it reuses heat from the exhaust gases. The hot gases from the burner normally leave through the flue. In a condensing system, these gases pass through a second heat exchanger, which transfers much of that leftover heat into the incoming cold water. This means more of the gas energy actually heats your water instead of being wasted. However, these systems cost more upfront, but in Townsville homes

Have you ever stepped into a shower only to be hit with a sudden burst of boiling water or struggled with a lukewarm stream when you wanted a hot shower? That frustrating or dangerous experience is exactly what a tempering valve is designed to prevent. It keeps your water flow steady and safe by blending the right amount of hot and cold water, so every tap in your home delivers a comfortable temperature. In this guide, we’ll walk you through how tempering valves work, why they matter, and what signs to watch for if yours isn’t performing as it should. TL;DR What Is a Tempering Valve? A tempering valve is a small but essential safety device shaped like a “T” that is fitted to your hot water system. Its job is to take the boiling water from your heater and mix it with a precise amount of cold water before it travels through your pipes. This ensures the water coming out of your taps is hot enough for a comfortable shower but not hot enough to cause a serious burn. In Townsville, it is a legal requirement to store your hot water at a minimum of 60°C to prevent the growth of harmful bacteria and protect your family. But this much hot water is not safe for use, so the tempering valve mixes in enough cold water to bring the temperature down to a controlled 50°C at the tap, giving you the perfect balance of hygiene and safety. How a Tempering Valve Works A tempering valve has three ports inside its brass body:  When you turn on a tap, hot and cold water enter their inlets and meet in the central chamber of the valve, where a small, wax-filled thermostatic element sits. This wax senses the temperature of the water. If the water is hotter or cooler than the set 50°C: This process happens continuously while the water is running, ensuring that the water is perfectly balanced before it ever leaves the valve and travels to your tap. Tempering Valve vs TMV: What’s the Difference? Both tempering valves and thermostatic mixing valves (TMVs) mix hot and cold water to prevent scalding, but they differ in precision, safety features, cost, and what places they suit best. 1. Accuracy and Safety Accuracy refers to how closely the water temperature at the tap matches the set target temperature. 2. Where They Are Used Queensland plumbing law specifies where each valve is required: 3. Maintenance and Lifespan Tempering valves usually last 5–8 years in Townsville. The tropical climate – high heat, humidity, and mineral-rich water – can cause them to wear out. If a tempering valve fails, a licensed plumber can replace it. Thermostatic mixing valves, however, are designed to be serviced rather than replaced. 4. Cost Tempering valves typically cost $150–$300 installed, depending on the valve type and plumber rates. TMVs are more expensive due to their high precision and servicing requirements, usually $400–$800+ installed. We have summarised the differences for your easy understanding. Feature Tempering Valve Thermostatic Mixing Valve (TMV) Accuracy +/- 3°C +/- 1°C Primary Use Residential Homes Hospitals, Schools, Aged Care Fail-Safe No (Usually) Yes (Mandatory) Service Needs Replace when faulty Annual testing is required by law Cost Budget-friendly Significantly higher In Summary, If you just want to keep your family safe and meet Queensland plumbing requirements in a regular household, the tempering valve on your hot water tank is all you need. If you run a business, such as a home-based daycare, your plumber will likely tell you that a TMV is required to meet stricter safety standards. Why Your Home Needs a Tempering Valve A tempering valve is essential for safety, comfort, and compliance. It protects your household while letting your hot water system work efficiently. Stop Third-Degree Burns in Seconds Most hot water tanks store water at 60°C or higher, and this water can cause a third-degree burn in just one second. A tempering valve reduces the temperature to a safe maximum of 50°C before it reaches your taps. At 50°C, it takes about five minutes to suffer a serious scald, giving children, the elderly, and anyone with sensitive skin plenty of time to react. Meet Legal Requirements in Queensland In Townsville, tempering valves are required by law, so a licensed plumber must install or replace a tempering valve when: Without a tempering valve, your system is non-compliant, which can lead to fines, insurance issues, or failed inspections. Kill Bacteria While Keeping You Safe Heating water to a high temperature might seem wasteful if you’re only going to cool it before use, but it’s essential for health. High tank temperatures prevent harmful bacteria from growing, while the tempering valve ensures the water coming out of your taps stays safe to touch. It’s a simple way to keep your household hygienic without risking burns. Improve Your System’s Capacity A tempering valve can increase the amount of usable hot water from your tank.  When your tank stores water at a very high temperature, you can mix it with cold tap water to reach a comfortable 50°C. This means the tank can supply hot water for more showers or baths than if the water were stored at a lower temperature, because each tap would already get the perfect temperature without adding cold water. Protect Your Plumbing Fixtures Water at 60°C constantly hitting taps, showerheads, and seals can damage your fixtures over time. By regulating the heat to a steady, low temperature, a tempering valve reduces this thermal stress, extending the lifespan of your tapware and preventing washers from wearing out prematurely. Get Consistent Temperature Without a tempering valve, the water coming out of your shower would be unpredictable. You would have to manually adjust the hot and cold taps every single time to get the temperature just right. The valve solves this by doing the mixing for you before the water leaves the pipes. This means you get the same comfortable temperature every time you turn on the tap,

There’s nothing more annoying than losing hot water in the middle of your shower.  Most often, the underlying cause is easily identifiable once you start paying close attention to the patterns. For example, does the hot water run out abruptly, or does the temperature slowly fade? Does it happen after a single short shower, or only when several taps or appliances are used at once? Once you recognise the pattern, you can often tell whether it’s something simple you can fix yourself or a problem that needs professional attention. In this guide, we’ll break down these patterns, explain what you can check and fix yourself, and when to call a professional, so your showers stay warm.  TL;DR Quick Triage: Identify Your Hot Water System and the Exact Symptom Before you do anything else, take a moment to confirm two things: Doing a quick check can help you narrow the problem down to the most likely causes. Step 1: Identify Your Hot Water System Different hot water systems heat, store, and deliver hot water in different ways, which directly affects how quickly hot water runs out and how quickly the system can produce more. In Townsville homes, the most common setups include: To confirm what type of system you have, check the data label or compliance plate on your hot water unit—usually on the side of the tank or casing. This label shows: These details tell you how much hot water the system can supply, how quickly it can reheat, and whether it’s likely to meet your household’s current demand. Step 2: Identify the Exact Runs Out Quickly Pattern  Now that you know which type of hot water system you have, the next step is to pay attention to how and when your hot water runs out. The pattern of the problem gives you a big clue about what’s causing it.  1. Hot water runs out after one short shower If your shower goes cold within 5–10 minutes, the issue is related to tank capacity or heating speed. This can happen because: 2. Other taps stay hot, but the shower goes lukewarm If taps in the kitchen or bathroom remain hot but the shower cools down quickly, the tank is fine – the problem is in the shower plumbing or mixing components. Common causes include: 3. Hot water availability changes from day to day Hot water levels vary day-to-day – sometimes your tank has enough, other times it runs low, depending on how and when your system heats the water. This is common with: By identifying your exact symptom pattern, you now know which category of causes to focus on: This makes it much easier to match your home’s situation to the real causes we have discussed below. Common Causes Your Hot Water Runs Out (and How to Confirm and Fix It) Insufficient Tank Capacity The most common reason hot water runs out is that your household demand exceeds the system’s capacity. For instance, a 125 L tank can empty quickly if multiple showers run back-to-back or if appliances like a dishwasher and washing machine are used simultaneously. That’s purely a tank-size issue – there simply isn’t enough stored hot water for your household needs. But often, plumbing and fixtures can make the problem worse. An older-style showerhead can use 15–20 L per minute, compared with a modern WELS 3‑star showerhead at around 9 L/min. In a 125 L tank, a 7‑minute shower with an older showerhead can nearly empty the supply, even if no other appliances are running. How to check for this issue: Monitor your household’s hot water use over 48 hours. If hot water only runs out when several showers or appliances are used at the same time, your system is likely undersized for your current household demand. Also, check your fixtures. Take a 10‑litre bucket and note how long it takes to fill from your shower or tap. If your shower fills the bucket quickly, as in the older example, it uses a lot of hot water, which can make your tank run out sooner. If it fills more slowly, your fixtures are efficient, and the problem is likely due to the tank size. How to fix: Sediment Buildup  Townsville’s water contains minerals that crystallise when heated. Over the years, these minerals settle at the bottom of your tank as sediment or scale, taking up space where hot water should be and reducing usable capacity. How to check for this issue: Listen to your tank; if you hear rumbling, popping, or banging noises (similar to a kettle boiling) coming from the unit, that is the sound of steam bubbles escaping through a thick layer of sediment.  How to fix:  Failed Dip Tube In a properly functioning storage tank, hot water rises to the top while cold water stays at the bottom. A dip tube – a long plastic pipe inside the tank – directs incoming cold water straight to the bottom. This keeps the hot water at the top hot for usage. In Townsville’s tropical heat, these plastic tubes can become brittle and snap over time. When a dip tube fails, cold water enters at the top and mixes immediately with the hot water. This dilutes the hot water, so even though the heating element is working, the water coming out of your taps quickly becomes lukewarm. How to check for this issue: Notice if your tank, which previously supplied enough hot water for multiple showers, now goes lukewarm halfway through a single shower. Also, you’ll often see the water start at the correct temperature, then drop off unusually quickly. How to fix: Schedule a licensed plumber to replace the dip tube. This could cost you around $250–$400, and it restores full hot water capacity. Faulty Thermostats and Heating Elements Electric storage tanks use heating elements inside the tank to warm the water. These elements are immersed in water, and a thermostat controls when they turn on and off to maintain the set temperature of 60°C, as required