This potable water expansion tank is used on gas, oil, or electric, direct-fired, residential water heater and hot water storage tank applications to absorb the increased volume of water created by thermal expansion. It also maintains balanced pressure throughout the water supply system by keeping system pressure below the T&P relief valve setting. This field-adjustable steel tank is air pre-charged at 20 psi, volume 4.5 gallons, designed with an FDA-approved polypropylene liner and Butyl rubber diaphragm, copper-lined steel, and 3/4 inch male inlet connection. An expansion membrane prevents air-to-water contact in the tank ensuring a long system life. IAPMO listed and ANSI/NSF 61 certified. The maximum pressure is 150 psi (10 bar).

• Prevents over-pressure caused by thermal expansion
• Air pre-charge at 20 psi
• 3/4 IN male connection
• Butyl rubber diaphragm

Weight	9.1 lb
Connection Size	3/4 in.
Height	13.50 in.
Horse Power	1/3
Length	10.50 in.
Material	Steel
Room	Utility
Width	10.50 in.
Inventory Number	WAT0067371
MPN	0067371

https://www.watts.com/dfsmedia/0533dbba17714b1ab581ab07a4cbb521/8654-source/Standard-Watts-Warranty