This expansion tank controls thermal expansion of water in open domestic hot water supply systems. It absorbs the increased volume of water generated by the hot water heating source. Its' pre-pressurized steel tank uses an expansion membrane to prevent air/water contact for long system life.
- Controls thermal expansion of water in open domestic hot water supply systems
- Keeps system pressure below relief setting of relief valve
- For use with all types of direct-fired water heaters
- Rugged butyl diaphragm