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What happens if an expansion tank stops working?
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Jan 15, 2024 · Updated on January 15, 2024. If your house has a water heater, there is a high chance that you have a thermal expansion tank. However, if the expansion tank ceases to work, you might find yourself in a severe problem. When such a thing occurs, you must solve the issue immediately.
What Happens if the Expansion / Compression Tank is Not Working? The loss of air cushion in the expansion / compression tank means that at each heating-on cycle the system pressure can be too high, causing the temperature/pressure relief valve to spill.
Dec 8, 2021 · The Thurra Engineer Surveyors share their findings of the most common faults they find when inspecting expansion vessels. Top 5 Defects – Expansion vessels. 1 Expansion vessel low pressure – A common occurrence which can cause the heating system to operate inefficiently and in some circumstanc
- Leaking expansion tank. Water can leak from an expansion tank at one of three places: Pipe fittings. If the pipe fittings at the top of the tank are loose, water may leak out.
- Tank pressure loss. An expansion tank can lose pressure if air leaks from the valve or the diaphragm itself. If the leak comes from the valve, more air can be added to the tank using an air compressor pump or a manual tire pump.
- Tank pressure too high. If the pressure inside the expansion tank is too high, it can be corrected by opening the Schrader valve at the top of the tank.
- Air blockage. An air blockage occurs in an expansion tank when the air inside the tank becomes trapped. The role of an expansion tank is to regulate pressure within your hot water system, but, when an expansion tank fails, the air inside can block water from flowing.
Expansion vessels should be able to work or operate for years without any intervention except for periodic draining and recharging as the unit gets older over time. However, hard water can damage the diaphragm inside the expansion vessel. In turn, it would cause it to fail by causing the diaphragm to pinhole.
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Jul 29, 2018 · This article series explains how to identify, inspect, install, repair, or service heating boiler expansion tanks: here we explain the function of expansion tanks on hot water (hydronic) heating systems. InspectAPedia tolerates no conflicts of interest.
Without an expansion tank, as the water heats and expands, the pressure inside the system would rise dramatically, often exceeding safe limits. High pressure can damage boiler components and cause leaks or even system shutdowns.
