Oatey Water Shock Arrestor is the i DIY solution to stop water surge pipe banging caused by quick-closing valves. Designed specifically for use on drinking water lines, this device features a triple O-ring sealed air chamber that maintains a 60 PSI air charge, effectively absorbing high-pressure surges. Its versatile installation allows it to be mounted without opening any walls and can be installed upside down or sideways without compromising its effectiveness. Each package contains one unit along with installation instructions for easy setup. Manufactured with low lead content, ensuring safety and compliance with standards. Model Number: 39177