The Stream33 4.5 Gallon Water Heater Expansion Tank is designed to provide a secure and effective means of handling thermal expansion in domestic hot water systems. This unit comes with a 3/4" NPT connection and is rated for a pre-charge pressure of 35 PSI, while it can safely handle a maximum working pressure of 150 PSI and temperatures up to 200°F. Its flexible design allows for either vertical or horizontal installation, accommodating various system configurations. Ideal for use in both residential and commercial settings, this expansion tank is an indispensable component for maintaining system pressure balance and preventing damage to the water heater and associated plumbing.