1/2"3/4"1" 1.5" 2" 2.5 Inch Pipe Connection Fittings Male Thread Equal Adapter
Rain Bird Barbed x Barbed Flex Pipe Coupling in the Flex Pipe Fittings & Risers department at Lowes.com
Amazon.com: Yahenda 5 Pcs 1/2 Inch Female Threaded PVC Fitting Double Female Thread Coupling Sprinkler Pipe Fitting for Garden Drip Irrigation System PVC NPT Coupler for Irrigation Pipes Riser Extension (Black) :
Amazon.com : iRunning Drip Irrigation Fittings Kit for 1/2 Inch Tubing, 20 Pieces Drip Irrigation Parts for Drip Sprinkler System - 8 Couplings, 6 Tees, 6 Elbows, Drip Line Connectors for 1/2"
Genova Poly Insert Reducing Coupling
Use Compression Couplings to Repair Lawn Sprinkler Pipe
Sprinkler Pipe Fittings and Couplings: Types and Uses