Brackets for holding a porous tube in a fixed position in a surrounding production mold material, which production mold is used in non-pressurized slip casting for forming vitreous china products, and to molding systems in combination with the brackets. The bracket is angled to provide first and second leg portions of elongated dimensions. The first leg portion is comprised of a magnetic material for removably adhering to magnets embedded in a case mold section for forming the production mold. Thus, the elongated dimension of the first leg portion corresponds to that which provides an adhering relationship to the embedded magnet. The second leg portion comprises a receptacle for holding a porous tube. In one embodiment of the invention, the receptacle is an aperture whereby the porous tube is threaded. In another embodiment, the receptacle is a depression whereby the porous tube snaps into position. Thus, the elongated dimension of the second leg portion corresponds to the desired spacing of the porous tube between the molding surface and the non-molding surface of the production mold. A plurality of dimpled projections are provided in the second leg portion adapted to provide an adhering relationship between the bracket and a surrounding mold material.