Specifications

93
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Typical InstallationX Ref
ASME Thermal Expansion Tank WTTA Series
Features Applications
• 3.5 gal. – 90.0 gal.
• Fixed bladder type for commercial and industrial applications
• Maximum pressure 150 psi
• ASME Section VIII
• Maximum temperature 240°F
• Factory air pre-charge – 40 psi
For Additional Information, Ask For WXT-WTTA or visit our web
site.
Designed for installation on potable hot water systems to protect against thermal expansion.
All WTTA tanks are ASME Section VIII fixed bladder type for commercial and industrial applica-
tions. When system pressure increases due to thermal expansion, water enters the tank’s blad-
der which expands into the pre-charge air chamber, keeping system pressure below the relief
valve setting.
 Water pressure reducing valve (Model NR3)
 Temperature & pressure relief valve (Model TP1100A)
 Pressure relief valve (Model P1000A)
Local codes shall govern installation requirements. Unless otherwise specified, the assembly shall be mounted at least 18” from the cold water inlet to the
heater. NOTE: Pre-charge should be adjusted to match incoming water pressure after installation (adjust pre-charge with no water pressure in tank).
 Pressure relief valve (Model P3000CI)
 Pressure relief valve (Model P3000BR)
 Reduced pressure backflow preventer (Model 975XL)
Accessories
T&P VALVE
TP1100A
DIRECTION OF FLOW
HOT WATER
HEATER
MODEL WTTA
HOSE BIBB
MODEL NR3
WATER PRESSURE
REDUCING VALVE
MODEL 975XL
T&P VALVE
TP1100A
DIRECTION OF FLOW
HOT WATER
HEATER
MODEL WTTA
HOSE BIBB
MODEL NR3
WATER PRESSURE
REDUCING VALVE
MODEL 975XL
WILKINS AMTROL WATTS ELBI WESSELS TACO
WTTA-5 ST-5-C DETA-5 DTS-8 TTA-5
WTTA-12 ST-12-C DETA-12 DTS-19 TTA-12
WTTA-20 ST-20V-C DETA-20 DTS-30 TTA-20 CX30
WTTA-30 ST-30V-C DETA-30 DTS-45 TTA-30
WTTA-42 ST-42V-C DETA-42 DTS-80 TTA-42 CX84
WTTA-60 ST-60V-C DETA-60 DTS-100 TTA-60
WTTA-80 DETA-80 DTS-140 TTA-80 CX130
WTTA-100 DETA-100 DTS-170 TTA-100 CX170
WTTA-125 ST-80V-C DETA-125 DTS-200 TTA-125 CX215
WTTA-160 ST-120V-C DETA-160 TTA-160 CX254
WTTA-180 ST-180V-C DETA-180 DTS-300 TTA-180 CX300
WTTA-210 ST-210V-C DETA-210 DTS-400 TTA-210 CX350
Miscellaneous Plumbing Products