Column pipe system

A column pipe system for use in submersible water well pump applications, the system comprising:

• a plurality of pipe sections coupled together to form an elongated discharge pipe having a vertical orientation, wherein each one of the pipe sections is made of a first material and has a first end and a second end;
• a respective plurality of first end transition fittings, each one of the first end transition fittings being fixedly coupled to the first end of a respective one of the pipe sections;
• a respective plurality of second end transition fittings, each one of the second end transition fittings being fixedly coupled to the second end of a respective one of the pipe sections;
• and
• a respective plurality of coupling members, wherein each one of the coupling members is coupled to one of the first end transition fittings and one of the second end transition fittings,
• wherein each one of the first end transition fittings and each one of the second end transition fittings has an external threaded portion made of a second material that is different from the first material.

A column pipe system for use in submersible water well pump applications, the system comprising:

• a first pipe section made of a first material and having a first proximal end and a first distal end;
• a second pipe section made of the first material and having a second proximal end and a second distal end;
• a first transition fitting fixedly coupled to the first distal end;
• and
• a second transition fitting fixedly coupled to the second proximal end,
• wherein the first transition fitting and the second transition fitting each have an external threaded portion made of a second material that is different from the first material.