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Wilkins WTTA Thermal Expansion Tank
Wilkins

Wilkins WTTA Thermal Expansion Tank

Designed for installation on hot water systems to protect against thermal expansion. All WTTA tanks are ASME fixed bladder type for commercial and industrial applications. When system pressure increases due to thermal expansion, water enters the tank’s bladder which expands into the pre-charge air chamber, keeping system pressure below the relief valve setting. Conforms to all lead-free requirements and acceptable for use on drinking water systems.
Specification
  • The Water Thermal Expansion Tank shall be constructed in accordance with Section VIII of the ASME Boiler and PressureVessel Code. The outer shell shall be carbon steel. The bladder shall be FDA approved butyl rubber and prevent water from contact with shell interior. The assembly shall have a top NPT stainless steel system connection and a 0.301”-32 charging valve connection (standard tire valve) to facilitate the on-site charging of the tank to meet system requirements. The Water Thermal Expansion Tank shall be a ZURN WILKINS Model WTTA.
Technical specification
  • Unique ref.zurn-wtta
  • Product familyThermal Expansion Tank
  • Product groupASME Thermal Expansion Tank
  • TypeObject (single object)
  • Date of publishing2025-09-02
  • Edition number1
Links
Related
  • Material mainCarbon Steel
  • Material secondaryStainless steel
  • Designed inUnited States
Classification
  • BIMobject CategoryPlumbing - Other

Region availability

North America
Anguilla
Antigua and Barbuda
Aruba
Barbados
Belize
Bermuda
British Virgin Islands
Canada
Caribbean Netherlands
Cayman Islands
Collectivity of Saint Martin
Costa Rica
Cuba
Curaçao
Dominica
Dominican Republic
El Salvador
Greenland
Grenada
Guadeloupe
Guatemala
Haiti
Honduras
Jamaica
Martinique
Mexico
Montserrat
Nicaragua
Panama
Puerto Rico
Saint Kitts and Nevis
Saint Lucia
Saint Pierre and Miquelon
Saint Vincent and the Grenadines
Saint-Barthélemy
Sint Maarten
The Bahamas
Trinidad and Tobago
Turks and Caicos Islands
U.S. Virgin Islands
United States

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