Add a quick connect fitting for a cheap and inexpesnive way to disconnect/reconnect your existing irrigation system. These are the fittings that attach to the clear middle valve, middle valve is not included, but they still attach to each other easily without leaking. 

Adapt a 3mm micro line going to a Blumat carrot to 8 mm tubing - quick and easy with this handy connector.

Later if you like, you can change either side for either 3 mm, 1/4, or 8 mm.