During the performance of leak tests of HEPA filter and adsorber banks of nuclear air treatment systems, it is not always possible to inject the challenge agent at a single point to achieve proper air/aerosol mixing or to obtain a representative sample from a single sampling point. It is then necessary to use a manifold to perform these functions. NUCON has designed, fabricated, installed, and qualified a wide variety of manifold designs for nuclear air treatment systems. Each air treatment system has unique characteristics which require custom design of manifolds. Based upon basic preliminary information about the system, NUCON can and will provide a proposal to design, and if desired, build, install, and qualify injection and test manifolds.