[yogi1]

I am planning on driving a 1 1/2' drive point well in my back yard to water yard, flowers, garden and maintain a certain level in my pond approx 5'd x 60' w x 125' l. The water table is approx 20' and I want to drive the well to about 35' or more, money being prime consideration. I have looked at numerous pumps and am thoroughly confused about lift and suction depth. I know most shallow well pumps are limited to about 26', but I have found one that has a suction depth of 75 feet, which I want. I need to know what lift means, I think I know what suction depth is, but would like a clarification. I would like the flow rate to be about 1000gpm if that is affordable. Should I have a pressure tank, if so, what size? If my gpm requirement is too high for a tank?

[jlisenbe]

1000 gpm is REALLY ambitious. MOst people would be glad to get 10 or 15. I just don't think that is going to happen.

There are two kinds of jetpumps. They are discussed at this website:

Jet Pumps — Part 1 - Archives - National Driller


Part of the article says this: "Shallow well jets have the injector attached to the pump above ground level and are limited to about 25 feet of lift, just like straight centrifugal pumps. Their only advantage over a straight centrifugal is their pressure boosting capability.

Deep well jets, on the other hand, have their jet injector down in the well below the water level, so they push the water to the surface. See Figure 2. Deep well jet pumps are not limited by atmospheric pressure to 25 feet of lift. A good deep well jet can pump water from as deep as 200 feet. Remember, when we say we are pumping from 200 feet, we are referring to the distance from the surface of the water in the well to the discharge point at or above ground level, not from the injector to the discharge point. "

So, you can see that going to 75' requires two pipes, which will not work for what you are attempting.