We’ll explain: A tank water heater has a safety device called the TPR (temperature and pressure relief) valve. Reason #3: The pressure/temperature in the tank is too highĭo you see water leaking from a pipe running down the side of the unit? If so, this could mean that your water heater is releasing water to reduce pressure or lower the temperature inside the tank. If you see water leaking around the drain valve, you should contact a plumber to inspect the valve and replace it if it is faulty. If the water is coming out of the drain valve (pictured below) at the bottom of the tank, then the valve itself could be faulty.Īfter repeated water heater flushes, sometimes the drain valve will not seal shut tightly, which creates a little leak. If the leak persists, the connection may need to be replaced by a professional. Try tightening the connections with a wrench. If so, the cold and hot water inlet pipe connections could be loose. See water leaking from the top of the water heater tank? Let’s look at some common reasons why tank units form leaks. Tank water heaters are more prone to leaks than tankless units, but the good news is that they are generally less expensive to repair. 4 reasons your tank water heater is leaking Our plumbers can quickly find the source of the leak and fix it. Want a Buffalo plumber to repair your water heater? Let’s look at each of these problems in more detail below. If you have a tankless water heater, the leak could be caused by: High pressure or temperature in the tank.If you have a tank water heater, leaks are commonly caused by: In this blog, we’ll share what causes your water heater to leak, depending on the type of water heater you have. If yours is leaking, you’ll want to contact a professional to find the source of the leak and fix the problem ASAP. But, if we see significant damage due to wear and tear or just old age, then we might suggest that you invest in a new hot water cylinder – financially, you’ll be far better off in the long run by ordering a replacement.Even the best water heaters can form leaks, especially as they get older. In some situations, a minor repair will greatly improve the performance of your system. As we’ve said before, we are hot water cylinder experts. If you have any concerns at all about your hot water cylinder, contact us and we’ll come to your place and sort things out for you. If the dripping continues, the valves are probably faulty and you need to contact us.If the dripping stops, this is normal thermal expansion.Turn off the power supply to the tank for five minutes.Here’s a simple test to determine what os going on: The dripping relief pipe you’re noticing is probably experiencing normal thermal expansion, but it could also have a faulty valve. These days, however, cold water relief valves are installed to the inlet side of the hot water cylinder to save hot water. In instances where a secondary safety vacuum break was not fitted, the water cylinder has exploded, blowing roofs off houses and buildings moving on their foundations. In some cases, it has had disastrous consequences. They’re obviously unaware that it is perfectly normal. We know of some cases where these vent or relief pipes have been blocked off by people in an attempt to stop the dripping. That extra water has to go somewhere! Hot water cylinders are manufactured to relieve this expanded hot water through an open vent pipe on the roof, or via a relief valve and pipe to an outside wall or drain. When the water in your cylinder is heated from cold, the volume can increase by as much as 3% in a hot water cylinder with a capacity of 180 litres, that is as much as 5.4 litres. That’s what we mean by thermal expansion. Your cylinder is just doing what it is designed to do. But in most cases, it’s simply a case of normal thermal expansion and nothing to be concerned about. At first glance, any hot water cylinder overflow might be alarming when you first see it. As hot water cylinder experts dealing with installation, repair and service, we receive plenty of enquiries about overflowing cylinders.
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