GARDENA OS 140 Pop up System Oscillating Sprinkler for Square and Rectangular Areas The water flow is infinitely adjustable; Thanks to the variable setting options, even smallest areas and narrow garden spots can be irrigated Through the installation of a Drain Valve (Art. No. 2760-20) in the pipeline, the Sprinkler system is frost-proof 16 flexible precision nozzles ensure even water distribution and a fine-mesh dirt filter ensures reliable operation He GARDENA Pop-up Oscillating Sprinkler OS 140 has a 3/4" female thread