This invention relates to a fluid distribution manifold, where the input piping is inserted in through the manifold's circular intake opening and into its cylindrical intake port. The manifold's intake port has an intake restraint rim on its inner surface in order to prevent the intake piping from being inserted too far into the manifold. In some embodiments, the manifold also has a glue trap located below the intake restraint rim, and of approximately the same dimensions and geometry as the intake restraint rim. The manifold's intake port leads to a cup- or parabola-shaped intake reservoir, where fluid is briefly housed prior to its distribution through several distribution output opening, and their respective distribution outlet ports. In some embodiments, the manifold's distribution outlet ports each possess an output restraint rim on the inner surface of each of the distribution outlet ports, to prevent the output piping from being inserted too far into the port. In a preferred embodiment, the manifold is constructed of polyvinyl chloride or acylonitrile-butadiene-styrene, and is used to distribute fluids, such as water and ozone, in spas and hydrotherapy baths.