Watts Expansion Tanks ET Series

Watts Expansion Tank Pricing

Non-Potable Water Expansion Tanks for Hot Water Heating Boilers and System

Series ET non-potable water expansion tanks are designed to absorb the increased volume of water created when the hot water boiler is heated and keep the system pressure below the relief setting of the relief valve. Series ET is a pre-pressurized steel tank with an expansion membrane that prevents contact of the water with the air in the tank. This prevents loss of air to the water and ensures long and trouble-free life for the system.

Selection Guide

As an alternative to using a formula, you can use this Quick Reference Sizing Chart above to select the correct tank for your system. This table is based upon a tank pre charge of 12psi (82kpa), a pressure relief valve setting of 30psi (2 bars) and a system operating temperature of 200°F (93°C). The chart takes into account typical system water volumes based upon boiler BTU’s and type of radiation installed. Simply go to the boiler output BTU equal to or higher than the installed boiler, read across the chart to the correct tank model as indicated by the type of system radiation column on the chart.

Features

• Steel construction
• Rugged flexible diaphragm
• Precharged at 12psi (82 kpa)
• Compact size saves space and energy
• Compatible with glycol in systems
• Watts Expansion Tanks ET Series

Watts Expansion Tanks ET Series: