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BMW B47 Problem (Vibration) 420D How to: Making solutions anaerobic with a gas manifold Drager Medical Gas Pipe Line System 05 Copper to copper brazing using BCuP5 filler metal, no flux. Bench braze for a boiler header, not purged since it will be cleaned at Edit with InShot: Sometimes people put the vacuum pump and the oxygen manifold in the same room – that is not allowed and very expensive change order. Remember, your manifolds ...