The Thermal Expansion Relief Valve can replace a water heater expansion tank because it functions similarly. Both products absorb the excess pressure in the plumbing system created by thermal expansion. As plumbers know, the expansion tank equalizes pressure throughout the plumbing system by providing a space for hot water to flow into. Without an expansion tank, pressure would be distributed to the entire plumbing system, straining it and decreasing its lifespan.

Like an expansion tank, the new Thermal Expansion Relief Valve also takes the load off your pipes by:

• Equalizing pressure
• Managing thermal expansion of water
• Keeping pipes from bursting or wearing out prematurely

Instead of storing water, though, the Thermal Expansion Relief Valve releases it, solving some of the problems that come with using an expansion tank.


Common Expansion Tank Problems
While expansion tanks are required by code in most closed-loop water heater systems, they have a reputation for failing. Common expansion tank issues include:

• Rubber Diaphragm Wear Out. The pressure below the rubber diaphragm in the tank may not have been set at the right level during installation, for example, allowing water to enter the tank too frequently and wearing out the diaphragm prematurely.
• Pinhole Leaks. Expansion tanks are also known for developing pinhole leaks in the rubber bladder, and there’s no way to know without going out of your way to test it or by noticing that the Temperature & Pressure Relief Valve (T&P) is going off frequently.
• Excessive Condensation Issues. Tanks can also become coated in condensation if there’s too much water in the tank, for instance, which can lead to messy pooling, dangerous dripping and eventually a rusty expansion tank.

Because there are coordinating valves and parts both outside and inside a water heater that determine whether water pressure is effectively and safely managed, there are many failure points that could lead to damaged plumbing systems — all without warning.

For more info contact Pressure Vessel Supplier or call us at +971 4 252 2966.