The Bailey 4074 Complete Drain Test Kit is a comprehensive air testing solution for drainage systems, designed to test drains and pipes to 4in (100mm) water gauge pressure. This ready-to-use kit provides all essential components needed by plumbers and drainage engineers to carry out professional air pressure tests on site. Ideal for Building Control compliance testing and drainage installation verification, this complete kit eliminates the need to source individual testing components separately. The inclusion of two different sized test nipple caps (1/2in and 1in) makes the kit versatile for testing various drain configurations and connection points. The hand bellows system provides controlled pressurisation whilst the 9ft tube offers flexibility when testing across different site layouts. The Y-piece connector enables efficient setup of the testing apparatus, whilst the 4in U-gauge delivers accurate pressure readings to confirm system integrity and identify any potential leaks in the