Irrigation pipes are mostly underground, running the entire length of your lawn, with heads arising to the surface to provide the grass and vegetation the water they need. These pipes are essential for your lawn because they water it, thus ensuring it is thick, lush green and the talk of the town. Sometimes, however, these pipes can get cracked and leak, causing puddles or pools of water to arise on the surface of your lawn, and your water bills to get high. This problem needs to be addressed immediately to prevent the situation from getting out of hand.
Locate the cracked pipe so you can begin fixing it. To do this, replace all caps on the spray heads and turn the water system on for twenty minutes. Turn the water supply off and take a walk in your lawn to identify any puddles or spongy area. Demarcate the area by spreading a layer of powdered chalk around it.
Use a shovel to dig the ground around the demarcated area until you reach the irrigation pipe below. Once you uncover the pipe, dig in both directions around the pipe, and a foot below it, so you can easily repair the leaked pipe. Most pipes are usually made from copper or PVC.
Collect the dirt in a heap or mound next to the trench, as you will need it to cover the hole later.
Determine the exact spot on the pipe that is leaking, and mark it by drawing a neat square around it with a marker, leaving at least 4 inches space around the spot.
Hold the pipe and carefully cut around the square with a hacksaw or pipe cutter. Sand the ends of the pipe to make them smooth.
Sand the insides of both the couplings with a wire brush so they can fit into the pipe easily. Insert a coupling over one end of the old pipe so it covers it half. Slide an end of the new pipe under the other half of the coupling. Repeat the procedure with the other end of the old pipe and second coupling.
Insert some solder wire on the top of the coupling that is connected to the old and new pipe, and heat the center of the coupling from below with a propane torch. The solder will melt with heat and begin to drip, covering the joint completely.
Apply a coat of tar-base weatherproofing to weatherproof the new pipe. Allow the pipe an hour to completely dry before you can cover the pipe with soil and turn the water supply back on.