Source 20 25 32 40 50mm Irrigation HDPE Compression Fittings Straight Tee Elbow Coupling Connector for Water Supply on m.alibaba.com
Rain Bird 1/2-in Barbed Drip Irrigation Coupling (Pack Of-4) in the Drip Irrigation Fittings department at Lowes.com
Drip Irrigation Pipe Fittings - China Pipe and Drip Irrigation price | Made-in-China.com
20-Pack) Drip Irrigation Brown Barbed Tee, Elbow, Coupling & End Cap Fittings Kit - Fits 1/2” Inch, 17mm .600” ID Drip Tubing - Made in The USA - Walmart.com
Amazon.com: 16 Pcs 1/2 inch Tubing Irrigation Fittings Kit, For (1/2" ID x0.6-0.63" OD) 16mm Drip Tubing Barbed Locked Nuts Connectors 2 Ends,2 Elbows,2 Switch Valves,2 US Standard Adapters,4 Tees 4 Couplings :
1/2" 3/4" 1" to 20mm 25mm 32mm PE Pipe Locked Tee Farmland Micro-irrigation Sprinkler Irrigation PE Pipe Quick Connection Tee - AliExpress