Preferred Construction Products

Hydro-Pneumatic Expansion Tanks

Cold Potable Applications • Pressure Booster Packages • Water Well Systems • Irrigation Systems

Used to absorb the additional volume of potable water created by a domestic water heater. These tank designs incorporate a diaphragm or bladder to isolate the expanded water from the pressure controlling air cushion.


  • Pre-charged (30PSIG)
  • 240°F Maximum Temp
  • Carbon steel shell and heavy duty butyl (FDA approved) bladder or diaphragm
  • FXA and FXT series can be installed vertically or horizontally

Hydro-Pneumatic Tanks

ModelDescriptionASMEGallonsMax Pressure
FX-SeriesRemovablenon-ASME2.1-528.0150 PSIG
FXT-SeriesFixed DiaphragmASME8-210200 PSIG
FXA-SeriesRemovable Bladder 125PSIASME10-3963125/200/250 PSIG
FXA-WG-SeriesRemovable Bladder w/WessGuard ®ASME10-3963125/200/250 PSIG
FXA-HP-SeriesHigh Pressure Removable BladderASME10-3963200/250 PSIG