Protects the water heater from thermal expansion^Absorbs the increased volume of water created when water is heated^For water heaters up to 50-Gallon^Contains a durable membrane to prevent contact of water with air in the tank^Pre-pressurized steel tank at 20 psi

• Watts DET-5 2.1 G Potable Water Expansion Tank for 50-Gallon Water Heaters
• 2.1-gallon

Watts DET-5 2.1 G Potable Water Expansion Tank for 50-Gallon Water HeatersWatts