Are the Drip Emitters Adjustable?
No (and yes). The cap on top of the drip emitter does screw on and off but, this is intended for cleaning of the internal flow disk. In normal operation, the cap should be “finger tight” or snug. This restricts the flow of water to the correct rate. If you loosen the cap, even slightly, the drip rate increases dramatically, causing the Ooze Tube to empty in a day or less. Sometimes this is useful for watering-in a new planting… or for giving the tree a quick shot of water without losing any to surface run off. However, it is nearly always best to leave the emitter cap screwed down snugly.