Watts, Series ET, ET-X-90 (Old Part# ET-90) (0066608)
Series ET, Radiant - Hydronic Heating Expansion Tank, 13 Gallon Volume (0066608) (Old Part# ET-90)
Features
3?4" male NPT connection for use with air separator Model AS.
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
The pre-pressurized steel tank features a durable expansion membrane that prevents contact of the water with the air in the tank. This rugged diaphragm minimizes loss of the air change and ensures long and trouble-free life for the system
