Irritec P1 5/8' drip tape 15 mil 12" Spacing 0.46 GPH 500' Roll P1 drip tape has no seams for more reliability and uniform installation. P1 drip tape is manufactured using injection molded drippers for a high degree of plugging resistance and uniform water distribution over long runs. P1 drip tape is used in both above ground and subsurface installations with equal success. The low profile drippers welded on the inside wall keeps friction loss to a minimum. Each dripper has an integrated inlet filter to prevent clogging.