For joining 2 cut pieces of flex-Drain (not included), Use to adapt FLEX-Drain to wyes and tees to help provide good fit and function, Adapts FLEX-Drain to end caps and pop-up emitters (caps and emitters not included), Female connections, Minimum working temperature of -50 degrees Fahrenheit and a maximum working temperature of 150 degrees Fahrenheit, Maximum working pressure of 70 psi, Polypropylene construction, Rated for soil drain and underground use.