Gardening: (2016– ) in Food Traditions & Culture Posted October 28 36 minutes ago, dcarch said: If that tank is above ground, you may not need a pump. There should be enough hydro-static pressure. If that tank is to be under ground, you may already know that you may have to anchor it down to prevent flotation, just like the installation of gasoline tanks. dcarch It's above ground but a couple of meters head won't drive much. The pump does self-prime. Smallish pump but now I can run a hand spray-nozzle. I haven't tried it on the micro-emitters yet. There's no way in heck I'd want to dig a hole to bury the tank in our clay & bedrock.