Hi all, newbie here. Yesterday I replaced our old well pump and jet valve (is that the right name?). Our well is about 50' deep and a couple feet in diameter. The pipes are black pvc, with a very slight curve. I checked the foot valve to make sure it holds water. It does. Then I place it on the pipe, and lower it into the well. At about 20-30' depth, the curve of the pipes cause the foot valve to lightly scrape the concrete wall, possibly creating material that falls into the bottom of the foot valve. Just before the foot valve reaches the waterline, I place a gallon or two into the pipe. It's has no trouble holding water. Then I hook up the pipes to the pump, and begin to prime. After several gallons, the water still does not reach the top. I disconnect the pipes from the pump, and begin pulling the pipes out. When the foot valve rises above the surface, I see that it is pouring water out. When all the pipe is out, I remove the valve and check it. Sure enough, sand or other foreign object is holding the valve open. Is there any way to lower this contraption into the well without the valve losing it's seal? I've been on this for 2 days now, and this is NOT how I wanted to spend my weekend!! Any advice is greatly appreciated!