This paper presents results of an experimental investigation into the way in which water-hammer pressures are transmitted through various types of surge tank. Orifice and differential surge tanks are subject to special scrutiny as in those instances the validity of the assumptions of the plane-fronted wave theory has frequently been subjected to doubt. Experimental results, however, confirm with good accuracy that the simplest and obvious assumptions are correct, and an adaptation of the Schnyder-Bergeron method is presented which allows transmitted pressures to be accurately estimated for most surge tanks. Some general formulae together with solutions of particular examples are included.
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