Page 1
Expansion Tanks
Certified to
NSF/ANSI 61-G and 372
TW SERIES EXPANSION TANKS FOR
POTABLE WATER HEATING SYSTEMS
Many of today’s water systems utilize backflow prevention or
pressure reducing valves. This seals off the system and requires the
use of an expansion tank, or the relief valve can discharge on each
heating cycle.
TW expansion tanks eliminate wasting hot water by providing the
adequate expansion needed in these systems.
Available in 2 and 5 gallon models they can provide adequate
relief for residential tanks up to 120 gallon.
TWO PIECE DESIGN
ONE YEAR WARRANTY
150 PSI WORKING PRESSURE
200°F MAXIMUM TEMPERATURE
Model
Number
TW-5 150 2.1 1.03 3/4” 8-1/4 10-3/16 5
TW-12 150 4.4 2.19 3/4” 11 14-3/4 9
Max.
Working
Pressure
(PSIG)
Tank
Volume
(GAL)
Max.
Acceptance
Volume
(60 PSI)
Conn.
Size
(MPT)
Diameter
(IN)
Height
(IN)
TW-5
TW-12
Weight
(LBS)
Rev May 2014 AOSEB55105
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