Homemade drip emitters / systems
The four plex emitter connector on the left is a commercial connector that is usually fairly expensive.
The multiplex emitter connector on the right is my homemade version. It is made from a flexible riser and PVC cap and regular drip connectors. The advantage is that I can connect as many connectors as I need and replace them if they get broke. The cost is usually much less than that of what a commercial four plex is. I drill 1/8 inch holes or the same diameter as the connector shaft. Then using pliers force the connector into the hole.