I am planning to install submersible pump and need your suggestion on type of Submersible column pipes (uPVC or GI) . The Pump dealer is suggesting GI column pipes whereas i see many advertisements on uPVC column pipes saying that they are good and cost effective alternatives to GI pipes with advantage of less frictional losses as compared to GI pipes (25% additional discharge). Even companies like Jindal which make GI pipes are also making uPVC pipes.
However, i did not have good experience with PVC casing pipes. During drilling of one bore wells , we were inserting Finolex casing pipe (180 mm 6 kgf / cm2 -06 MPA) and they broke into small pieces after inserting 3 lengths. Drilling people claim that this is due to high water pressure. (we got 2" water for this bore well at 200 feet and close to 3" water around 400 feet). Because of this, i am wondering whether uPVC is good choice for submersible column pipes.
I am looking column pipes for 2 no. of bore wells with different depths
Bore-well 1 : 7.5 HP / 600 Feet / Water yield 1.5"
Bore-well 2 : 7.5 HP / 400 Feet / Water yield 3" (This is the well where casing pipe broke into small pieces )
Request your suggestions and inputs on selecting the submersible column pipes.