Calefactio HGT-30 Expansion Tank (4.8 Gal Volume)

Calefactio HGT-30 Expansion Tank (4.8 Gal Volume)

Calefactio HGT-30 Expansion Tank (4.8 Gal Volume) QR Code
Product Code: HGT-30

Availability: In Stock

Weight:0.10 lb

Usually ships: 1 business days
Qty: Add to Cart

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The HGT-30 from Calefactio is an Expansion Tank (4.8 gal). It's a #30 bladder-type expansion tank designed for use in closed-loop hydronic and radiant heating systems. It is a direct replacement for Amtrol Extrol #30, B&G HFT-30 and Watts ETX-30 models.


  • Full acceptance bladder;
  • Compatible with conventional heating & radiant systems, glycol containing systems (up to 50/50 mix) and select solar applications;
  • No contact with steel shell means no corrosion;
  • Bladder design prevents waterlogging;
  • Direct replacement for #30 models from other manufacturers;
  • For non-potable water applications only.

Technical Specifications:

  • Factory pre-charge pressure: 12 psi;
  • System connection: 1/2" male threaded;
  • Max. operating temperature: 240°F;
  • Max. operating pressure: 115 psi;
  • Expansion tank volume: 4.0 gallons;
  • Height: 16.3";
  • Diameter: 10.6";
  • Weight: 9 lbs.


  • 5-year manufacturer's warranty.
Product Specs
Expansion tank volume:4.0 gallons
Factory pre-charge pressure:12 psi
Max. Operating Pressure:115 psi
Max. operating temperature:240°F
System connection:1/2" male threaded
Weight:9 lbs.
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