Abstract: A pop-up-sprinkler housing has a cap sleeve (1) that slides adjustably into a base sleeve (2) having a base plate (3) with a fluid conveyance (4) that screws onto underground sprinkler plumbing (10) and into sprinkler shafts (8). A housing cap (11) on top of the cap sleeve has a sprinkler-shaft aperture (12) that is sized and shaped to allow ingress and egress of pop-up portions (13) of select sprinkler shafts and has cap-sleeve shoulders (14) that extend over the base sleeve and a support surface (15). Threaded fasteners are provided for attaching the fluid conveyance to the sprinkler shafts and to the underground sprinkler plumbing. A plurality of sprinkler adapters 31 are provided for adaptation to different sizes and types of pop-up sprinklers.