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Easyflex TankOne thermal expansion tanks are made of high quality 16 gauge cold rolled steel shell with butyl rubber diaphragm, which is factory pre-charged conveniently at 40 psig. The stainless steel ¾ “MIP Hex, makes it easy to install quickly and securely. TankOne’s maximum pressure of 150 psi and maximum temperature rating of 200 Fahrenheit will provide support for your hot water heaters. TankOne is tested and cUPC certified.
Thermal Expansion Tank
  • Designed to protect potable water heater systems, helping to maintain operational efficiency.
Tankless Water Heater Isolation Valve Kit :
  • Stainless Steel 3/4" MIP with Hex
  • Butyl Rubber Diaphragm
  • NSF 61 & 372 Compliant
  • Factory pre-charged at 40 psig
  • Protects water heater, fixtures and appliances
  • Prevents dangerous pressure build up
  • Stainless steel connector
  • Provides a reservoir for expanded water volume
  • cUPC
Shell 16 gauge cold rolled steel
Diaphragm 100% butyl rubber, lined with polypropylene
Connection Stainless Steel
Connection Size 3/4" MIP
Tank Volume 2 Gallons / 4.5 Gallons
Factory Pre-Charge 40 psi
Max. Pressure 150 psi
Max. Temperature 200 °F