Orbit WaterMaster Underground 53066 Brass Anti-Siphon Repair Kit, 3/4-Inch and 1-Inch Repairs both 3/4-inch. and 1-inch. valves For orbit (51001, 51002, 51016, 51006, 51007, 51016, 51017, 51052, 51053, 51059, 57065, 57066), champion (100, 200, 300, 350, 466, 466p, iasp, iasva, ivba, ivbau), rain bird/lawnlife (asv, asvu, av, avu, sv, vb, vbu), superior, and hydro rain Durable, long-lasting washer and gaskets High-quality construction For outdoor use with cold water only