The Model AC Circuit Sentry Hose Kit is an Automatic flow control hose kit. The Circuit Sentry Valve is a pressure independent flow limiting device that maintains constant fluid flow, automatically compensating for fluctuating pressure conditions. This unique automatic flow control valve has large open flow paths for clog-free operation. The Circuit Sentry Valve has a removable/replaceable flow cartridge which facilitates easy flushing of the piping for commissioning the system, and allows for easy change of flow rates if needed. Valve is equipped with an integrated ball shut off and two pressure/temperature test ports.