A connector member (10) for use with a sprinkler system includes a hollow body (12) having a passage (14) therein, and at least two open end portions (16) for communication with the exterior. Each open end portion (16) includes an inner tubular section (18) in communication with the passage (14) of the body (12), and an outer tubular section (20) in a concentric relation with the inner tubular sections (18). The outer tubular section (20) includes external threads (23) on its surface around the central axis, and several slits (21) extending from the edge axially. The connector member (10) further includes two types of covers (26, 28) for respective cooperation with the open end portions (16) wherein one type is a fastening device (26) to firmly attach the pipe onto one open and portion (16) of the connector member (10), and the other type is a irrigation device (28) installed onto the other open end portion (16) for adjustable spraying water on the ground around such connector member (10).