hi i have a old water well hole on the property out back and was wanting to pump water out of it.a friend gave me a old berkley jet pump that sits on top of the caseing and another friend gave me a jet for it.i bought new poly pipe and fittings and check valve, put it all together.Put water in both pipes before adding the pump plumbed it in to a tank and power, put about 30 gallons of water in the tank opened the bleeder up and let the air out and turned it on and i can't seem to get it to pump water.is there a trick that i have missed or let me no anything that could be wrong for it not to want to pump water.any trouble shooting would sure be of help im sure thank you Duane