The ½" Extender with Eyeball and Nut threads into 1¼" FPT and fits Swimquip/Sta-Rite #8428 and 8429 fittings (models with four threaded brass inserts). Ideal for remodels, it adds ½" of extension for a new finish and installs flush with no surface protrusion. Can be stacked with p/n ASDxxx to increase extension as needed. Eliminates the need to remove existing fittings. Made from UV-resistant ABS engineered polymer.