I have a dripper system for use in a greenhouse or garden. There is plenty of tubing and lots of drippers that will adjust from a drip to a constant flow. The joiners are all there all you need is a water butt pump to attach it all to. I used this for keeping my plants watered while on holidays.
There are a second lot of smaller drippers but not much tube to go with that although the tubing is the easy bit to get.
Self watering drippers and tubing for a greenhouse (St Nicholas SG1)
This offer has been gifted to someone and is no longer available.