For joining two 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 deg F and a maximum working temperature of 150 deg F. Maximum working pressure of 70 psi, Polypropylene construction, Rated for soil drain and underground use.