It’s prudent in the event of a leaking overflow pipe to contact a Gas Safe registered engineer to come and fully analyse the situation and carry out any repairs necessary. While possible to remedy smaller issues, leaks can be serious especially if they’re left or not properly fixed, compounding the tissue. Cracks and corrosion in the boiler casing or pipework are also classic signs of a leak. Hallmarks of a LeakĪpart from the obvious signs of a leak - the expelling of water from a source that should not do so, keep on the lookout for a boiler pressure gauge reading unusually low, i.e anything below 1.5 bars.įault (error) codes are another indicator of low pressure due to leaks or component failure. Broken CoilĪ broken coil in the hot water cylinder can also cause an overflowing cistern, this can allow hot water from the feed and expansion tank to mix with the cold water in the storage cistern. The plumbing washers may be worn due to their constant contact with water, or some boilers have lower quality components than others which may not last as long. If the valve moves but does not rise with the water, it could have a hole in it. Faulty (or jammed) float valveīallcocks or float valves control the filling of a cistern or tank, firstly you must assess if the float valve is flowing freely when the water is running, if stuck, attempt to carefully release. When water pressure is too high for an overflow pipe to handle it can cause leaks or the water valve can become loose. There are several potential causes of an overflow pipe leak, these can include: Increased water pressure The common plumbing systems that feature an overflow pipe: What Is An Overflow Pipe?Īn overflow pipe’s general purpose is to transport excess water from a home's water storage tank (or cistern) to outside the home, avoiding flooding.Īn overflow pipe can feed into the drain or in some cases an expansion tank (copper cylinder). In this blog we’re going to be exploring the issue of a leaking overflow pipe, including what are the potential causes, and how to fix them.
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