Water heater expansion tank. Ideal to maintain the efficiency and safety of your home's water system. This thermal expansion tank is designed to manage pressure build-up in closed, potable water systems. By preventing unnecessary pressure increases, this tank ensures your water heater's pressure relief valve stays closed, which not only saves energy but also eliminates potential safety hazards. With a Water Worker expansion tank, you can enjoy peace of mind knowing that your system is running smoothly, efficiently, and safely.

• Heavy-duty steel diaphragm for extended life
• Polypropylene liner provides corrosion resistant reservoir
• Connection Type: Male NPT
• Maximum temperature: 200 Deg F
• Adjustable air charge fitting with protective plastic cap for air tight seal
• Factory pre-charged at 40 psi
• Safe for domestic potable water use
• Satisfies plumbing code requirements
• IAPMO and NSF complaint
• Limited 5 Yr. warranty