This device takes does the same job, but takes up 90% less space. Why you should opt for a thermal expansion valve over a traditional expansion tank - Mifab
IAPMO
Water Heater Expansion Tank Information
Amazon.com: Midline Valve 3349 Expansion Tank Isolator Relief Valve, with Drain, with T-handle, 1/2 in. FIP x MIP, Brass : Everything Else
Do I Need A Water Heater Expansion Tank in Texas?
Expansion Tanks vs. Pressure Tanks
Thermal Expansion
Best Practices for Hydronic Systems Part 5: Installing an Expansion Tank —
How to Set Up a Bladder Expansion Tank | Boiler Specialists
SharkBite 3/4 in. Brass Thermal Expansion Relief Valve 25704LF - The Home Depot
Why the relief valve at the water heater is leaking, and what to do about it
EASTMAN 2-Gallons Expansion Pressure Tank in the Pressure Tanks department at Lowes.com
Water Heater Temperature & Pressure Reducing Valve - Trident Plumbing