Hi, I just finished running water and electric to the other side of my yard, about 70' away. I dug a narrow trench about 10-12 inches deep. With my rocky ground, thats all I could manage. Most say the trench should be 18" deep. I plan on blowing out the waterline before winter so wasn't too concerned with freezing. In NH, water lines are supposed to be around 4' deep to prevent freezing, NJ maybe less. I used 3/4 black poly for the water line. I used 12/2 UF-B wire(rated for wet locations) inside a 3/4 PVC conduit for the outlet run. Both in the same trench. For the outlet you need to use a 20A GFCI outlet. The outlet should be in a weather tight box on a post. I feed my poly water line from a frost proof, anti-siphon hose spigot from the house. Tip for pulling the wire. Glue together the PVC conduit so you have a nice water tight run. Then take a piece of a packing peanut(sized a little smaller than the PVC diameter)and poke a hole in it, then tie a string to the styrofoam peanut and drop it in the PVC conduit. Take a shop vac and duct tape it to the other end. Turn on the vac and it will pull the peanut with the string attched thru the pipe. Now you have a string to pull your wire thru with. I didn't have a 100' snake around, so this worked great for me...LOL. Dave

Hi max, If you can't tell from measuring the outside diameter, just buy a 1/2", 3/4", 1" and use the one that works and return the rest. These repair couplings are not expensive. A 3/4" pvc pipe outside diameter will be a little wider than the 3/4" inside diameter and so on. If you are able to measure the inside diameter then that would the nominal size of the pipe and repair fitting. Happy DIYing. Aloha

I grow tomatoes using aeroponics, ramp and "static" techniques. In each instance, the individual root balls are about the size of a large grapefruit. Root balls are pourus, of coarse, but several in a line would tend to jam up a tube, I'd think. Here's the niftiest way I've seen yet to grow tomatoes: http://www.youtube.com/watch?v=C5l902ktiWo&feature=related This beats the heck out of both ramp and NFT methods, to my way of thinking. It's my first fling with a "static" system, but so far, everything seems to be going well. Static growing requires no pumps nor aeration.

You might get more help on the irrigation forum.