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What Is an Expansion Tank? An expansion tank is designed to relieve pressure in both potable water and closed hydronic heating systems. It ensures that constant pressure is...
What Is a Water Heater Expansion Tank? A water heater expansion tank—or thermal expansion tank—is a small tank added to a water supply pipe. It acts as a safety device and minimizes the risk of pressure damage, bursts, and leaks in a home's plumbing system.
Expansion tank in a central heating system. An expansion tank or expansion vessel is a small tank used to protect closed water heating systems and domestic hot water systems from excessive pressure.
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An expansion tank is usually installed directly above the water heater using a tee-fitting installed in the cold water delivery pipe. It typically sits vertically— but can also sit horizontally if there are space constraints and your specific tank allows.
Find the answers to common water heater expansion tank questions. Our complete guide has all the info you need, including tank types, sizes, and installation.
Extrol expansion tanks accept expanded fluid in closed-loop hydronic systems to control pressure buildup, improve comfort and help reduce energy costs. Nearly seven decades after inventing the first diaphragm expansion tank, Amtrol’s lineup now includes specialty models engineered for modern, high-efficiency systems.