I noticed my drip irrigation pipe was leaking a few months back. I was too lazy to fix it but now we are in a middle of severe drought in California, I thought I should take care of it to avoid wasting our precious water. Here I recorded a video on how I fixed it:

Here are the lessons I have learned:
1. 3/4″ PVP pipe is NOT exactly 3/4″, neither are 1/2″ and 1″ pipes or any of the PVC pipes. In fact, the 3/4″ pipe has an outer diameter of 1.05″ and inner diameter of 0.82″. The number represents roughly an average of the inner diameter and outer diameter, depending on what type of PVC pipes (Schedule 40 vs. thicker Schedule 80). See here for the actual measurements.
2. PVC pipes are very inexpensive and easy to put together like Lego blocks. The 10′ 3/4″ PVC pipe cost me just $2.50. This gave me lots of ideas how to use it for other purposes. See future blogs on the other uses of PVC pipes.