Deep Well Convertible Jet Pump. Where to install ejector?

[Irving]

So I'm a woodworker but also stray into many other areas when I have to. I'm going to be installing a deep well convertible jet pump into my shop which has a 70 foot well. After looking at various diagrams I'm a bit confused on how I should set this up.

In this picture the ejector is installed directly on the pump.

But this diagram shows the ejector down at the bottom of the well with a send and return line.

So which is it? Is there a specific situation for each setup?

 

[Matt30]

70 foot well you will be running a 2 line set up. The manual with the pump will tell you what depth the injector should be at. Most are around 25ft

 

[speedbump]

If you already have this well, how many pipes are coming from the well to the old pump? If one, the ejector goes on the pump and is considered a shallow well. If two, the ejector goes into the well and is probably already there; this is a deep well.

If you have the well but there was never a pump on it and it has no pipes coming from it; measure the depth to water from ground level. If it's less than 25 feet, its a shallow well. If it's more than 25 feet, it's a deep well.