This invention relates to apparatus for locating therein a pipe union. The apparatus comprises a housing adapted to be secured to a building structure such as a wall, the housing having a chamber adapted to receive the union, and means removably secured thereto so that the union is secured in the housing by the said means co-operating with the housing. The invention is particularly adapted to be secured to a -building structure for securing a pipe union adjacent the structure, the union being adapted to be connected to a conduit, such as a pipe, for supplying services in the building.