I ran a 1/2 inch pvc line out to my garden for a faucet. I tee'd off an existing line and ran it straight out for a distance of 130 ft. When I got the pipe connected and buried, I turned on the faucet at the garden, and but there's no water. Obviously, there's a blockage somewhere. Is there any way I can locate where the blockage is without having to dig up all 130 ft of the pipe? Any help would be much appreciated.