For more than a century, Wessels has set the standard in American-made pressure vessels for HVAC and hydronic systems. Their ASME and non-ASME expansion tanks are built to exacting global standards, including the Japanese Inspection Standard (JIS). Each unit is fully traceable for lasting reliability.
Oslin Nation Co. is the Texas distributor for Wessels, providing expansion and thermal tanks engineered for code compliance and long-term performance.
Browse Wessels Expansion & Thermal Tanks
Find Wessels bladder, diaphragm, compression, and thermal expansion tanks with Oslin Nation Co. to maintain system balance, protect equipment, and ensure stable, safe operation in HVAC and hydronic applications.
Bladder Expansion Tanks
ASME and non-ASME bladder designs for hydronic systems requiring long-term reliability.
Diaphragm Expansion Tanks
Fixed-diaphragm models including WessView smart monitoring options for easy maintenance.
Compression Tanks
Traditional compression tanks engineered for durability and straightforward installation.
Find the Right Wessels Tank For Your Application
Use Oslin Nation Co.’s Find a Product Tool to match your system volume, pressure, and code requirements to the correct Wessels tank.
We’re Here To Help
Have a complex pressure or volume challenge? Oslin Nation Co. can help you choose the Wessels tank that keeps your system running efficiently and within code.
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