Watts ET Expansion Tanks for Radiant and Hydronic Heating Closed loop systems. Series ET Non-Potable Water Expansion Tanks are for use in commercial and residential closed loop hydronic heating system piping to control the thermal expansion of hot water and maintain system pressure below the relief setting of the relief valve. 

Boiler Expansion Tank 

  • EXT-15 (2.1 gallon)
  • EXT-30 (4.5 gallon)
  • EXT-60 (6 gallon)
  • EXT90 (15.gallon)

Hot Water Expansion Tank (Watts Series PLT Potable Water Expansion Tanks)

  • PLT-5 (2.1 gallon)
  • PLT-12 (4.5 gallon)

Duramac Pressure Booster Pumps

  • 17035R020PC1 - 35LB Boost Max 115 Volt
  • 17040C035PC2 - 40LB Boost Max 230 Volt
  • 17052R020PC1 - 52LB Boost Max 115 Volt
  • 17070R020PC2 - 70LB Boost Max 240 Volt

Specs & Literature