Are you wondering what causes a hot water cylinder to overflow? If so, then you have come to the right place. Here at Matthews Plumbing & Gasfitting Ltd, we specialise in high-quality plumbing and gasfitting solutions at reasonable prices – which includes the maintenance and repair of hot water cylinders.
Interested in learning more about what to do if your hot water cylinder overflows? Don’t stop reading.
In essence, a hot water cylinder is a water storage tank that is designed to store and heat water in homes. This means that homes have a readily available supply of hot water for a number of domestic uses, from washing dishes to showering.
So, how can they overflow?
Water expands by as much as 3% when heated, also known as thermal expansion. Hot water cylinders are designed to relieve this extra water via an open vent pipe or a relief valve and pipe. However, when individuals see these pipes dripping, they might block these pipes – and this is how the hot water cylinder can overflow.
Dripping from the relief pipes is normal, so when you block these off, this actually leads to the pipe itself overflowing, causing a leak. In some cases, overflowing hot water cylinders might also be caused by corroded systems, which is why it’s important to regularly maintain and service your hot water system.
First, turn off the water. If the dripping stops (and you haven’t blocked the pipes), then the dripping is normal. But, if it continues, then this might be a sign that it needs repairs. Before doing anything else, seek the assistance of professionals like ourselves at Matthews Plumbing & Gasfitting. You can rely on us to identify the problem and provide affordable solutions with ease.
At Matthews Plumbing & Gasfitting, we are dedicated to providing exceptional plumbing and gasfitting services, including the maintenance and repair of hot water cylinders. Now that you know the answer to, “Why does my hot water cylinder overflow?”, you can count on the Matthews Plumbing & Gasfitting team to help if this situation occurs. Need urgent assistance? Call us today. Alternatively, get in touch with us to book a service or to learn more.
Your hot water cylinder may overflow if the vent or relief pipes are blocked and the system cannot release normal thermal expansion. Hot water expands by up to 3% when heated. If a dripping relief pipe has been blocked, pressure can build and force an overflow. Corrosion and lack of servicing can also contribute to this problem.
A hot water cylinder overflows when it cannot safely release expanded hot water through its vent or relief system, often because pipes have been blocked. The blog explains that dripping from relief pipes is normal, and blocking them can lead to an overflow.
Turn off the water supply to stop the overflow, then call a licensed plumber. Do not block any dripping relief or vent pipes. Our team can inspect the system, find the cause, and repair the fault safely.
A dripping overflow or relief pipe can be normal because the cylinder releases extra water created by thermal expansion. The blog warns that blocking a dripping pipe can cause the cylinder to overflow and leak.
If the dripping continues after you turn off the water and you have not blocked any pipes, it may be a sign that the system needs repairs. The blog also notes that corrosion can play a part, which is why regular maintenance helps.
If the overflow pipe runs continuously, turn off the water and get a plumber to check it, because ongoing flow can signal a fault that needs repair. The blog’s guidance is to turn off the water first, then seek professional assistance to identify the problem and resolve it.
