The Oatey 34475 Quiet Pipes Series Water Hammer Arrestor is a plumbing component engineered to eliminate disruptive banging noises and safeguard plumbing systems from the detrimental effects of water hammer. Constructed from durable copper, it utilizes a piston design with dual NBR O-rings to absorb sudden pressure shock when water flow rapidly stops. This AA-size arrestor features a 1/4 inch OD Compression x Female Compression Tee connection, enabling inline installation on either hot or cold water supply lines. It is ASNI/ASSE 1010-2004 Certified and cUPC Listed, confirming its lead-free status and adherence to plumbing standards. Designed for versatile placement, it can be installed in any orientation without requiring drywall modification, making it suitable for quick-closing valves in both residential and commercial settings. It is rated for a maximum pressure of 60 PSI and an operating temperature range of 33 to 180 degrees Fahrenheit.