I need to somehow get a 5/8 drip line from one flower bed to another passing under about 6' of 3" patio concrete.
I'm thinking I'll need to dig down for elbow room and use the garden hose attached to a 5/8 pvc pipe to blast my way through. I asked HomeDepot if there was a certain attachment I could attach to the end of a 5/8 pvc pipe to maximize pressure but they seem dumb founded about it.
I think you're going to make a muddy mess if you use water for this. Depending on your soil conditions, you might try a length of 1" heavy duty galvanized electrical conduit. You would need to dig a trench the length of the pipe plus room to work on one end of the patio and smack the pipe through with a sledge hammer. Works great as long as there are no large rocks.