A vaporizer assembly is shaped and configured to fit partially into a downstem of a water pipe. The vaporizer assembly includes a housing including an upper portion and a lower portion. The lower portion has a smaller diameter, and fits in the downstem. The upper portion of the vaporizer assembly includes a bowl or dish, and a heat source is enclosed within the housing and positioned and configured to selectively heat the bowl or dish. A body of the vaporizer adjacent the bowl includes vapor passages. One or more passages are also formed in the lower portion. Thus, essential oils or waxes placed in the bowl can be vaporized by the heat. The generated vapor may flow from the bowl into and through the vapor passages and lower portion passage and into the waterpipe's downstem.
