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Honeywell TK300-15 Heating Expansion Tank, 1/2-Inch NPT, 2.0 gal

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Product Specifications
General Information
Product Line
Connection Type
Storage Volume (Gallons)
2 Gallons
Maximum Acceptance Volume (Gallons)
Connection Size (Inches)
0.5 Inches
Product Diameter (Inches)
8 Inches
Product Height (Inches)
12.63 Inches
Product Weight (Pounds)
4.75 Pounds
Warranty Information
Parts Warranty (Years)
1 Year
Model: TK300-15
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Honeywell Heating Expansion Tank, 1/2" NPT, 2.0 gal

The Honeywell TK300-15 Heating Expansion Tank is designed to absorb hot water expansion in closed heating systems. It is equipped with a butyl diaphragm to separate the air from the system water (glycol). The tanks are a welded, not clamped design. Pre-pressurized at 12 PSI, the tanks keeps fluid circulating and maintains minimum system pressure. Honeywell tanks resist waterlogging, loss of pressure through relief valve spills, loss of BTUs and reduce circulator running time. Use the super efficient Honeywell PowerVent or air vents to remove air and micro-bubbles from the system for maximum performance. The Honeywell TK300-15 Heating Expansion Tank has a volume of 2 gallons and maximum acceptance volume of 1 gallons. The Honeywell TK300-15 Heating Expansion Tank has a 0.5 inch NPT connection.

Honeywell TK300-15 Heating Expansion Tank Features:
  • Butyl/EPDM diaphragm, nine times better than natural rubber
  • Deep-drawn steel tank
  • Controls system pressure
  • Air-tight cushion-factory pre-charged to 12 PSIG and 100% tested
Honeywell TK300-15 Heating Expansion Tank Warranty:
  • Parts: 1 Year

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