Sometimes there is no option but to run pipes or conduit under a sidewalk. In that case, you can rent a power boring machine, buy an expensive sidewalk sleeve tool, or buy the walkway tunnel kit. The walkway tunnel kit is an inexpensive first step, and it may be just perfect for your needs. The kit includes a nozzle for one end of the pipe and a hose connection for the other end. You will need to buy a length of 3/4 in. pipe that is slightly longer than the area you are tunneling under, and PVC cement to glue the nozzle and hose connection fittings to the pipe. If you are installing 1 in. PVC pipe, you will need to buy a 1 in. x 3/4 in. PVC bushing. Your garden hose provides trenching power. When you are finished tunneling, you will cut off the fittings, leaving the pipe in place under the sidewalk. Recommended operating pressure is 60 PSI. For outdoor irrigation use with cold water only.