Central heating systems have been in use now for decades. For the most part, such systems work flawlessly for many years, both commercial and residential versions. However, when heating deficiencies are observed, a loss in water pressure could be caused by a leak in or around the boiler of the water heater or heat exchanger.. Open the drain-off valve to let the water out. Wait for the water to stop coming out of the hose. Vent the radiator on the highest floor by opening the bleed valve screws. Wait for the water to stop coming out of the hose. Close the drain off valve. Add the leak sealer to a radiator on that same floor.
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Leak sealant is ideal for small holes on non-delicate systems. For example, a hole in a container or a small gap in a barrel could do with sealant. Even if you don’t know where the leak is, the sealant will find it for you. When you apply leak sealant over a surface, the fluid spreads across it until it finds the gaps.. Causes of Central Heating Leaks. Before understanding the central heating leak detection process, let’s look at some of the top causes of central heating leaks. Here are 5 of the most common causes: Wear and tear / age of your central heating system. Linked to that, corrosion of copper pipes. Damage, including accidental damage, to pipes.