This BAI4074 drain test kit is an off-the-shelf solution for the completion of air tests to 4in (100mm) water gauge pressure on drains and pipes. Contains: 1 x 4in U-Gauge 1 x 9ft Tube 1 x Hand Bellows 1 x Y-Piece 1 x 1/2in Test Nipple Cap 1 x 1in Test Nipple Cap