By far the most popular connection type is the standard slip coupling connection. Standard Slip Coupling Connectors are available in sizes ranging from 3/4" to 2" with socket x socket connections for gluing into PVC pipe. Standard Coupling Connectors are manufactured from Schedule 40 PVC with 1/4" nylon barbed tubing connections. Standard Coupling Connections are used to connect the EZ-FLO system to the irrigation flow line before or after the valve with the 1/4" flexible tubing which is included with every EZ-FLO system. These connectors can be used in both new and retrofit installations. Not recommended for EZ005 and larger models.