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Mfr. Model:

290 In Stock

WATTS®, ST-12, Thermal Expansion Tank for Potable Water, 4.4 Gallon, 3/4" NPT Connection, 150 PSIG Maximum Work Pressure, 200° F Maximum Operating Temperature.

  • BackStop® A series tanks are fixed diaphragm type pre-charged thermal expansion tanks
  • They are designed to absorb the expansion forces and control the pressure in potable water systems
  • The water is separated using the heavy duty diaphragm preventing tank corrosion and waterlogging
  • Stainless steel system connection, heavy duty butyl rubber diaphragm
  • 35 psi factory pre-set pressure
  • Technical Details
    Height: 15 Inch
    Finish: Epoxy Coating
    Item Name: Potable Water Thermal Expansion Tank
    Type: Pressurized
    Diameter: 11 Inch
    Temperature Rating: 200 deg F
    Series: A Series
    Connection Size: 3/4 Inch
    Pressure Rating: 150 psi
    Connection Type: NPT
    Brand: BackStop
    Tank Capacity: 4.5 gal
    Material: Carbon Steel