Rain Bird HT075BFFS Drip Irrigation Backflow Preventer and 150 Mesh Filter, 3/4" Female Hose Thread Prevents backflow contamination of potable/clean drinking water supply from Drip irrigation systems Connects to any 3/4" male pipe threaded faucet, garden hose or component 150 mesh stainless steel filter catches debris to keep system functioning properly Durable, robust design provides reliable operation Constructed of highly durable UV and chemical-resistant materials To automate your system, add a Rain Bird 1ZEHTMR Hose-End Timer (sold separately)