On a hill and not getting even water distribution? Here's the solution — a heavy wall dripline with pressure compensating emitters. Just keep your pressure between 7 and 60 psi and get an even water flow with the same amount of water coming out at the beginning as at the end of your line. The drippers have the largest filtration area in their class, super high clog resistance, and exceptional long life. Resistant to common fertilizers, UV, and stress cracking; this easily becomes the best choice for permanent crops like vineyards, fruit and nut trees.