Modular Fluid System can be integrated with a main fluid supply system. It was independently implemented for continuous and reliable supply of mixed fluids to a particular application, such as off-shore pipeline welding operations. This system is used for connecting with two or more surface mount type fluid components, each having an inlet port and an adjacent aligned outlet port. It comprises one or more bridge fittings, wherein each of said bridge fitting comprises housing and a projection extending from said housing. A channel blocks having a groove for receiving said bridge fitting therein and an aligned complementary shaped hole for receiving said projection.