Dig Drip Emitter for TOP 12-Outlet Manifold With O-RIng - Pack of 300These are replacement emitters for the TOP 12 Outlet Manifold Available with . 6, 1, 2 and 3. 3 GPH per outlet, the TOP can deliver water directly to up to 12 plants with less water evaporation and wind drift than the overhead sprinkler heads it replaces. Using the TOP can save a significant amount of water by improving irrigation efficiency and lowering water runoff. For additional savings, check with your city for drip irrigation rebate program