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ASME DHW Storage Tanks, 80-175 Gallon

ASME DHW Storage Tanks, 80-175 Gallon

Storage tanks are required in conjunction with WH water heaters.  The heater provides rapid heating of a small volume of water; the tank provides a storage medium with enough capacity to handle short-term loads.  This separation of functions provides extremely fast, flexible recovery.

Under ASME section IV part HLW rules, an ASME-compliant tank is required when the total system volume exceeds 120 gallons, or when the total heating capacity exceeds 200,000 BTUH. 

When properly selected and installed, these tanks can provide 80% draw without appreciable temperature decrease in a single-temperature application.


  • Available in 80, 115 and 175-gallon sizes.
  • 150 PSIG maximum working pressure
  • ASME stamped
  • Two magnesium anodes included
  • Glass-lined steel jacketed
  • Insulated with rigid foam to R12.9, meets ASHRAE 90.1
  • 2 NPT connections for heater piping and tank outlet
  • Ports for T&P valve, tankstat, thermometer, and drain valve
  • The tank can be installed whenever the demand requires stored water of 80 to 175 gallons. Whether installed individually or as several tanks in parallel, this tank can provide 80% draw without an appreciable temperature decrease in single-temperature applications.

    • 80, 115 and 175 gallon sizes 
    • ASME HLW construction standard 
    • 125 PSIG MAWP for 80-gallon tank 
    • 160 PSIG MAWP for 115-gallon tank 
    • 150 PSI maximum working pressure for 175-gallon tank 
    • Two magnesium anodes 
    • Meets ASHRAE 90.1b-1992 
    • Meets CA code requirements 
    • Insulated with rigid foam at a minimum R value of 12.9 
    • 5-year limited warranty 
    • 3/4 NPT drain valve Proudly assembled in the USA
Technical specification
  • Unique ref.ASME-DHW-Storage-Tanks-80-175-Gallon
  • Product familyBoilers & Water Heaters
  • Product groupStorage Tanks
  • TypeObject (single object)
  • Date of publishing2021-01-18
  • Edition number1
  • Material mainSteel
  • Designed inUnited States
  • Manufactured inUnited States
  • BIMobject CategoryHVAC - Water heaters
  • IFC classificationTank
  • OmniClass Number23-27 29 19
  • OmniClass TitleTanks

Region availability

North America
United States