Expansion Tank
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For open and closed loop hydronic and radiant systems
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Butyl diaphragm for superior air retention - 9 times better than rubber.
Provides separation of system water from air cushion.
Controls system pressure.
No routine maintenance necessary.
Expansion Tanks for Closed Loop Heating Systems
For a boiler up to a net output of 50,000 btu/hr use model ET15
For 50,000 to 150,000 BTU/hr. use Model ET30
For 150,000 to 250,000 BTU/hr. use Model ET60
Expansion Tanks for Closed Loop Heating Systems
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ET15 - 2 gal.
1/2" M P T
(Male Pipe Thread)
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ET30 - 4.4 gal
1/2" M P T
(Male Pipe Thread)
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ET60 - 6.5 gal
1/2" M P T
(Male Pipe Thread)
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Expansion Tanks for Open Loop Heating Systems
Also used for Potable Drinking Water Heaters
For water heaters up to 60 gallons use model ST-5.
For water heaters up to 120 gallons use model ST-12.
Expansion Tanks for Open Loop Heating Systems or Potable Drinking Water
Model & Size
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ST-5 - 2 gal.
3/4" M P T
(Male Pipe Thread)
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ST-12 - 4.4 gal.
3/4" M P T
(Male Pipe Thread)
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