Accumulated air can cause catastrophes to the pipeline systems. Generation of vacuum leads to pipeline implosion or pressure transients. The preventive course is use of efficient Air Release valves & use of Anti-Vacuum Valves at the critical locations of the pipeline that are prone to vacuum generation. The R & D Multiple’s Anti- Vacuum valves are designed & manufactured to be extremely responsive & sensitive to the pressure decrease in the line. They instantly allow the entry of sufficient quantity of air at the slight hint of the inception of vacuum & preclude the possibility of vacuum build–up.